Learn the Basics for Solving a System of Equations by Elimination

👉Learn how to solve a system (of equations) by elimination. A system of equations is a set of equations which are collectively satisfied by one solution of the variables. The elimination method of solving a system of equations involves making the coefficient of one of the variables to be equal in all the equations that make up the system, in order to eliminate the variable using subtraction (or addition as the case may be). The coefficients can be made equal by multiplying the entire equation with a number which when multiplied to the coefficient of the variable to be eliminated gives the LCM of the coefficients of the variable to be eliminated in all the equations. Then we solve for the remaining variable(s).
After we have obtained the solution{s} for the remaining variable(s), we substitute the obtained solution into any of the original equations to obtain the solution of the eliminated variable.
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Organized Videos:
✅Solve a System of Equations Algebraically
• Solve a System of Equa...
✅Solve a System of Equations Using Substitution | Easy
• Solve a System of Equa...
✅Solve a System of Equations Using Substitution | Hard
• Solve a System of Equa...
✅Solve a System of Equations Using Substitution | Learn About
• Solve a System of Equa...
✅Solve a System of Equations Using Elimination | Learn About
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✅Solve a System of Equations Using Elimination | Easy
• Solve a System of Equa...
✅Solve a System of Equations Using Elimination | Medium
• Solve a System of Equa...
✅Solve a System of Equations Using Elimination | Hard
• Solve a System of Equa...
✅Solve a System of Equations Word Problem
• Solve a System of Equa...
✅Solve a System of Equations With Three Variables
• Solve a System of Equa...
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👨‍👩‍👧‍👧 About Me: I make short, to-the-point online math tutorials. I struggled with math growing up and have been able to use those experiences to help students improve in math through practical applications and tips. Find more here: www.freemathvideos.com/about-me/
#Systemofequations #Algebraically #brianmclogan

Пікірлер: 225

  • @_tehilah
    @_tehilah5 жыл бұрын

    we all have a justin in our class lol

  • @zman9315

    @zman9315

    5 жыл бұрын

    lol judging from when this video was made Justin is in college now. Hopefully...

  • @Mattt414

    @Mattt414

    4 жыл бұрын

    Aidan nope he didn’t listen in class

  • @zezy9961

    @zezy9961

    3 жыл бұрын

    And he’s cracked at fortnite my guy

  • @vimalancocoa

    @vimalancocoa

    3 жыл бұрын

    justin stop playing fortnite in class

  • @boredomity3575

    @boredomity3575

    3 жыл бұрын

    @@zezy9961 and crack

  • @alkalinehydra6784
    @alkalinehydra67846 жыл бұрын

    I can see your stress levels rising. Thank you for all the help.

  • @brianmclogan

    @brianmclogan

    6 жыл бұрын

    haha life of a teacher

  • @goushii7994
    @goushii79945 жыл бұрын

    Sometimes you seem to do a better job than khan academy

  • @brianmclogan

    @brianmclogan

    5 жыл бұрын

    So happy I could help!!

  • @YungYorii

    @YungYorii

    5 жыл бұрын

    Sasuke why are you here

  • @kit-kattaylorzz4199

    @kit-kattaylorzz4199

    4 жыл бұрын

    i agree, and i love ur pfp

  • @thatguymos

    @thatguymos

    4 жыл бұрын

    Jordan xu ha nice pfp

  • @mofon893

    @mofon893

    4 жыл бұрын

    More like all the time

  • @lorettajackson3816
    @lorettajackson38164 жыл бұрын

    1:32, he is like THESE DANG KIDS, I DON'T GET PAID ENOUGH FOR THIS

  • @SaylorMP

    @SaylorMP

    3 жыл бұрын

    He’s trying to take a video too😭😂

  • @nte0631
    @nte06313 жыл бұрын

    My favorite things about these videos, aside from them being immensely helpful to someone who hasn't taken a math class since 2012, is the authentic feel of the classroom; disruptions and all! Makes me feel like I am in high school again every time I watch these videos.

  • @penelopeclotineVera

    @penelopeclotineVera

    2 жыл бұрын

    yeah and reminds me of my 11th grade Math teacher who was always strung out on coke

  • @hekzter3895

    @hekzter3895

    2 жыл бұрын

    @@penelopeclotineVera what the FUCK

  • @joanl.7543

    @joanl.7543

    2 жыл бұрын

    If you ask me, he should have edited that part out. Not sure how difficult that editing might have been, but disruptions are not relevant and are at least somewhat private to those physically in the class.

  • @elsimmo75

    @elsimmo75

    2 жыл бұрын

    @@joanl.7543 i bet your fun at parties

  • @joanl.7543

    @joanl.7543

    2 жыл бұрын

    @@elsimmo75 Random school misbehavior doesn't need to be viewed by 130K people. That's all I'm saying. I guess most of us got "corrected" by the teacher from time to time.

  • @mallyra8888
    @mallyra88885 жыл бұрын

    I wish you were my math teacher 😢

  • @Hanadsrequiem
    @Hanadsrequiem5 жыл бұрын

    justin is pissing me off

  • @paperchasindude6578

    @paperchasindude6578

    5 жыл бұрын

    Justin from 13 reasons why

  • @vanessajeanclaude

    @vanessajeanclaude

    3 жыл бұрын

    🤣🤣🤣😂

  • @keiraryan6226
    @keiraryan62263 жыл бұрын

    Honestly thank you so much. My math teacher has given up on me at this point and your videos are my only hope! This makes my math classes so much easier.❤️

  • @JoJo-ul4qs
    @JoJo-ul4qs5 жыл бұрын

    Lol second video I’ve watched of yours and Justin was distracting the class in both videos

  • @jacquesirby3597

    @jacquesirby3597

    4 жыл бұрын

    What was the other video

  • @jjsmalls.r6670
    @jjsmalls.r66704 жыл бұрын

    Justin needs to appreciate that he has this guy as a tracher

  • @dede0577

    @dede0577

    3 жыл бұрын

    Tell me abt it!!

  • @jonahwilliams4511

    @jonahwilliams4511

    3 жыл бұрын

    A tracher

  • @chqmbie.mp3509
    @chqmbie.mp35094 жыл бұрын

    1:34 is my teacher when we say we dont understand anything that hes saying for the millionth time

  • @smith6836

    @smith6836

    2 жыл бұрын

    especially me

  • @Veclores
    @Veclores4 жыл бұрын

    cmon justin just be quiet im tryna learnnnnn edit: Justin: interupts like 5 times Brian McLogan: *epic sigh* 1:33

  • @ms.sherlock
    @ms.sherlock3 жыл бұрын

    That face palm and classic sigh was hilarious but thanks to your explanations I learned how to do this elimination technique. I hope that makes you feel better.

  • @a100chunks3
    @a100chunks32 жыл бұрын

    Brian thank you so much I would never be able to do this without your explanation Your awesome 😎

  • @rylanmartin9040
    @rylanmartin90403 жыл бұрын

    Thank you so much! You are such a good teacher! I hope you are still teaching!!!!!!!!!

  • @justdancefitted2023
    @justdancefitted20235 жыл бұрын

    You saved me I finally understand!!! My teacher doesn't explain the lesson that good and you made it so easy!

  • @tophercrews2011
    @tophercrews20116 жыл бұрын

    Thank you so much for your videos. Between your logarithm videos and this series I might have a chance at passing my college algebra final. You’re the man.

  • @brianmclogan

    @brianmclogan

    6 жыл бұрын

    you are very welcome! best of luck!

  • @el.950

    @el.950

    4 жыл бұрын

    You're taking that in college?? I'm at grade 9 (American International School Egypt, AISE) and I'm taking it 😅

  • @saharshbuddhe1221

    @saharshbuddhe1221

    4 жыл бұрын

    @@el.950 im in 8th my man

  • @diegodiaz3356

    @diegodiaz3356

    3 жыл бұрын

    Saarländer me too wtf that guy talking about

  • @tophercrews2011

    @tophercrews2011

    3 жыл бұрын

    I took calculus in high school but didn't go to college until 6 years after I graduated. After 6 years you get a little rusty with things you don't use every day. I also have always excelled more in statistical analysis rather than algebraic formulas. The high school curriculum also serves as more of an entry-level gateway into the collegiate curriculum. Not to say that the course work isn't difficult, but it's definitely nice to have a teacher in the classroom. I took all of my math classes online and taught myself. So as much as anyone would like to laugh about someone in college finding help with algebra online remember that we are all here to learn.

  • @d3ziram7
    @d3ziram73 жыл бұрын

    thank you, you have no idea how many times you've helped me!

  • @jgkim3280
    @jgkim32805 жыл бұрын

    This video is very useful!! It's very lucky to have such videos.

  • @dawnrosejurgensen8154
    @dawnrosejurgensen81545 жыл бұрын

    0:16 when moto moto looks at u

  • @kimb2582
    @kimb25829 ай бұрын

    I am a highschool math teacher and I need a supplemental video to show my students. I stumbled across this and LOL, it is good to see there's a Justin who disrupts every class.

  • @leolin35
    @leolin355 жыл бұрын

    I have a grudge against substitution

  • @Strutzela
    @Strutzela5 жыл бұрын

    You should maybe update some videos with different or more “unique problems”. I know this video is for the basics. I’ve watched so many of your videos this year and wanted to say thank you very much!! You’re the reason I’m passing math 😂

  • @AidenHuff16
    @AidenHuff163 жыл бұрын

    Watching your videos has made studying for my finals a lot easier.

  • @jamesk7312
    @jamesk73125 жыл бұрын

    Who gave this video a thumbs down?best video I've seen so far.

  • @litzyt6049

    @litzyt6049

    5 жыл бұрын

    Justin

  • @jessielizabethk

    @jessielizabethk

    3 жыл бұрын

    @@litzyt6049 lmao

  • @rachelhomie4336

    @rachelhomie4336

    3 жыл бұрын

    I'm saying

  • @rachelhomie4336

    @rachelhomie4336

    3 жыл бұрын

    I'm saying

  • @NativeBox
    @NativeBox Жыл бұрын

    Thank you so much, I am taking an applied linear algebra and my teacher assumed we knew this already. This was so easy when you explained it!!!!!!!!

  • @cat-vd8sh
    @cat-vd8sh3 жыл бұрын

    How do we know if we should add or subtract the equations after matching up an x or y

  • @robycocua
    @robycocua3 жыл бұрын

    Yessss. BecAuse of you, I finally understood it! Many blesses for your teaching

  • @braileybishop2005
    @braileybishop20052 жыл бұрын

    Can you multiply both equations if one of the coefficients can’t get to the other?

  • @zenlife2u
    @zenlife2u4 жыл бұрын

    thank you soooo much it helped me a lot I'm in beginning and intermediate algebra well its stats still too but you helped me a lot wish you where my teacher i would totally pay attention to your class you make it easy for me to understand

  • @aadipahwa5804
    @aadipahwa58044 жыл бұрын

    Thx so much I watch this at night and did my hw with ease all thanks to you

  • @Sultan_A
    @Sultan_A3 ай бұрын

    🌟 Very Good, Brian McLogan, Keep It Up 🌟

  • @Ericamidwife
    @Ericamidwife6 жыл бұрын

    Thank you, thank you, thank you. This helped me so much. 👏🏾

  • @brianmclogan

    @brianmclogan

    6 жыл бұрын

    you are very welcome!

  • @RachelMcburnett
    @RachelMcburnett5 жыл бұрын

    Bless this channel 😌

  • @tdinoto11
    @tdinoto113 жыл бұрын

    I love when you have to manage the class. I feel ya buddy....

  • @MathForEveryoneOriginal
    @MathForEveryoneOriginal3 жыл бұрын

    Really nice explanation of solving an equation system.

  • @AmarSingh-zn1pt
    @AmarSingh-zn1pt3 жыл бұрын

    Only reason I'm even understanding stuff in math thank you

  • @reamn

    @reamn

    3 жыл бұрын

    Go to edu Rising sun channel

  • @crossfacedup4053
    @crossfacedup40535 жыл бұрын

    Thank you so much for the help ‼️‼️‼️‼️‼️

  • @brianmclogan

    @brianmclogan

    5 жыл бұрын

    you are very welcome!

  • @user-pd5jv7jx7j
    @user-pd5jv7jx7j8 ай бұрын

    Can't say thank you enough my teacher spent so much time confusing my class within minutes I understood what to do thank you so much

  • @tanapolsukhumthamarat141
    @tanapolsukhumthamarat1413 ай бұрын

    If you never exist I wouldn’t figure this equation out. Nice job bro from Thailand 🇹🇭❤️

  • @user-nj6bt5gy4s
    @user-nj6bt5gy4s Жыл бұрын

    1:26 wow that takes me back lmao. The shush and the face palm and sigh and everything lol

  • @brianmclogan

    @brianmclogan

    Жыл бұрын

    Remix

  • @CeciliaFaithJournal
    @CeciliaFaithJournal5 жыл бұрын

    This is well explained and easy to understand...Can you be my instructor!!

  • @michaelgrandolfo2258
    @michaelgrandolfo2258Ай бұрын

    I actually understand this now!

  • @travberg9737
    @travberg97376 жыл бұрын

    Thanks!

  • @brianmclogan

    @brianmclogan

    6 жыл бұрын

    you are very welcome!

  • @michaelgrandolfo2258
    @michaelgrandolfo2258Ай бұрын

    Thank you brother

  • @akashthomas9384
    @akashthomas93843 жыл бұрын

    Mr, Brian can you explain why did u multiply a -3 for the second equation. Like how do we know which specific number had to be multiplied to eliminate the variables?

  • @wawoah1942

    @wawoah1942

    2 жыл бұрын

    One term has to be gone:), thats the gist of it. He multiplied -3 so the x will cancel out if added together^°^

  • @joelchristman
    @joelchristman4 жыл бұрын

    Omy gosh thank you so much you're literally a lifesaver also I'm definitely Justin in class but I actually listen unlike him😂 I just talk a good bit

  • @jazrenegaralda2449
    @jazrenegaralda24493 жыл бұрын

    Hi sir, quick question. How did you get the -3 in x -3y=9

  • @andrewfeng7411
    @andrewfeng74115 жыл бұрын

    I think you need more Aspirin.

  • @charzisgod
    @charzisgod3 жыл бұрын

    thanks sir!

  • @brysonscott8362
    @brysonscott83625 жыл бұрын

    your going to help me pass my math test

  • @nemaiianzlumbu5884
    @nemaiianzlumbu58846 жыл бұрын

    explaination on point bro😃👍👍

  • @brianmclogan

    @brianmclogan

    6 жыл бұрын

    cheers!

  • @charmayne417_
    @charmayne417_3 жыл бұрын

    Thankyou so much for this

  • @the-satisfying1486

    @the-satisfying1486

    3 жыл бұрын

    💜💜

  • @oqqrc1437
    @oqqrc14374 жыл бұрын

    I’m in 8th grade and am learning this today, thanks for the extra help.

  • @xburkez

    @xburkez

    4 жыл бұрын

    Bhoulets I have a quiz tomorrow on it

  • @oqqrc1437

    @oqqrc1437

    4 жыл бұрын

    x Burkez u got it this bro, remember to study!

  • @xburkez

    @xburkez

    4 жыл бұрын

    Bhoulets thanks I still am lmao how did u do

  • @evie5375

    @evie5375

    3 жыл бұрын

    i'm in 11th grade and can confirm it is still helpful in high school.

  • @housmhm805
    @housmhm8053 жыл бұрын

    thank you so much

  • @ameerkasana7319
    @ameerkasana73192 жыл бұрын

    Justin is probably flipping burgers for being disrespectful to you sir. You are doing gods work honestly because some people are struggling even in college.

  • @mr.snoopyscoops28
    @mr.snoopyscoops285 жыл бұрын

    Wow an education with a lot of comments I use to see vids with 5 or not even 1 comment

  • @aleenakhan618
    @aleenakhan6186 жыл бұрын

    How do you know what to multiply the equation by?

  • @brianmclogan

    @brianmclogan

    6 жыл бұрын

    you want to get the coefficients the same so whatever number multiples to give you the same coefficient for the same variable in both equations

  • @aleenakhan618

    @aleenakhan618

    6 жыл бұрын

    Thank you so much you’re awesome!

  • @brianmclogan

    @brianmclogan

    6 жыл бұрын

    you are very welcome!

  • @GeeSedan
    @GeeSedan5 жыл бұрын

    My teacher uses khan academy and no one gets what they say. I’m going to recommend this brilliant guy to my algebra teacher

  • @celebritygt7518
    @celebritygt75183 жыл бұрын

    tysm for teaching

  • @mr.mankeyyy
    @mr.mankeyyy5 ай бұрын

    GG for teaching for so long!!

  • @colbybormann7986
    @colbybormann79863 жыл бұрын

    does justin know that 92k people got mad at him?

  • @farizfaiz9740
    @farizfaiz97406 ай бұрын

    ❤❤❤Brooo! Tysm!!!

  • @rosien8893
    @rosien88934 жыл бұрын

    I have a question, solving for the simultaneous question, 5x + y= 21, x- 3y=9?? the second question is if y=2x4 and h=4x+6 find the value of a and y??? I need help please I'm struggling with maths. thanks, I really love maths but is difficult for me

  • @cabanero98
    @cabanero983 ай бұрын

    @2:07 2y-3y is not 5y ?? isn't it -1 please correct me sir.

  • @ishmelwalker
    @ishmelwalker2 жыл бұрын

    i cant multi task so i like the videos like if i copy notes i wont understand the notes because i cant listen and copy notes and vica versa so thankyou

  • @zoroxtreme867
    @zoroxtreme8674 жыл бұрын

    You saved my math grade

  • @cristianbaltazar276
    @cristianbaltazar2765 жыл бұрын

    oh my fucking god thank you I finally understand I wish you were my teacher my math teacher does not teach it like u thanks alot

  • @hassanmo610
    @hassanmo610 Жыл бұрын

    Damn...this is actually starting to make sense to me

  • @rachelhomie4336
    @rachelhomie43363 жыл бұрын

    There'll always be those who just keep talking.. U students lucky!!😖

  • @frogz62
    @frogz622 жыл бұрын

    God dammit justin I had to rewind 3 times because you keep making me lose my train of thought

  • @Gracewitinher
    @Gracewitinher5 жыл бұрын

    Aren’t you suppose to mutiply it by a negative 3 because both can’t be positives 🤔

  • @SA-Entertainment38

    @SA-Entertainment38

    5 жыл бұрын

    he did later @5:03

  • @raisdiyhomerenovations8615
    @raisdiyhomerenovations86153 ай бұрын

    Justin a fool with it 🤣 😂

  • @remadevik1465
    @remadevik14653 жыл бұрын

    Can you please eliminate this 15 a+b=2 and 2a-b=15 I am confused

  • @yt.zinx313
    @yt.zinx313 Жыл бұрын

    @ 0:28 my friend justin is just cracked at fortnite my guy.

  • @snipelessTS5
    @snipelessTS55 жыл бұрын

    God dammit Justin pay attention

  • @gatos1800
    @gatos18003 жыл бұрын

    damn it justin

  • @22Jex
    @22Jex3 жыл бұрын

    What school? Imma see if I can get into your class 🏃💨👀

  • @rickbelho4967
    @rickbelho49675 жыл бұрын

    My friends are doing Khan Academy buttt... I am still stuck a long way back😭😭

  • @YungYorii

    @YungYorii

    5 жыл бұрын

    math is annoying at times it's really a good subject it's just your teacher that really doesn't do much

  • @raizenmadlangbayan7817
    @raizenmadlangbayan78173 жыл бұрын

    1:27 - 1:31 He lagged

  • @insz6620
    @insz6620 Жыл бұрын

    Justin, please focus I'm trying to study for my quiz in 20 minutes.

  • @kemoyjackson3417
    @kemoyjackson34173 жыл бұрын

    teacher: punches justin in his face

  • @sal.h4833
    @sal.h48333 жыл бұрын

    1:33 me after finishing school

  • @jordanmcgee1293
    @jordanmcgee12935 жыл бұрын

    Dammit Justin LISTEN

  • @AmenTarik
    @AmenTarik6 ай бұрын

    I score 49% but after this video I scored 87% with just 1 video before I entered in the exam

  • @darrienandrus8196
    @darrienandrus81963 жыл бұрын

    I Wish that you were my teacher

  • @siemlybi
    @siemlybi9 ай бұрын

    I hope Justin is doing well now 8 years later

  • @mckennareed9139
    @mckennareed91394 жыл бұрын

    What grade is this

  • @zestymidas
    @zestymidas3 жыл бұрын

    poor justin LMAO

  • @lui9291
    @lui92914 жыл бұрын

    Damnit justin...

  • @user-cq9kg2zw3f
    @user-cq9kg2zw3f Жыл бұрын

    this kids don't realize how lucky they are

  • @dipson4625
    @dipson46252 жыл бұрын

    Dang it justin

  • @brianmclogan

    @brianmclogan

    2 жыл бұрын

    Haha

  • @SteveSmith-lk1tb
    @SteveSmith-lk1tb4 жыл бұрын

    solve using a coefficient of 3000

  • @brimiller7867
    @brimiller78673 жыл бұрын

    yo is justin ok?

  • @juniorkale314
    @juniorkale3143 жыл бұрын

    A little bit of zoom on your working out.....

  • @michaelpeever4492
    @michaelpeever44923 жыл бұрын

    Justin!!!!!

  • @ChavoMysterio
    @ChavoMysterio3 жыл бұрын

    3x+2y=-17 x-3y=9 multiply by -3 3x+2y=-17 -3x+9y=-27 --------------------- 11y=-44 y=-4 3x+2(-4)=-17 3x-8=-17 3x=-9 x=-3 x-3(-4)=9 x+12=9 x=-3 Solution: (-3, -4)

  • @Draginx
    @Draginx3 жыл бұрын

    damnit justin

  • @urlover1072
    @urlover10723 жыл бұрын

    Is he alive bro?

  • @doodie5369
    @doodie5369 Жыл бұрын

    It’s very distracting to learn when you are correcting the behavior of your also, when you don’t know how to subtract or add correctly as a math teacher is part of the problem.