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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Пікірлер: 225
we all have a justin in our class lol
@zman9315
5 жыл бұрын
lol judging from when this video was made Justin is in college now. Hopefully...
@Mattt414
4 жыл бұрын
Aidan nope he didn’t listen in class
@zezy9961
3 жыл бұрын
And he’s cracked at fortnite my guy
@vimalancocoa
3 жыл бұрын
justin stop playing fortnite in class
@boredomity3575
3 жыл бұрын
@@zezy9961 and crack
I can see your stress levels rising. Thank you for all the help.
@brianmclogan
6 жыл бұрын
haha life of a teacher
Sometimes you seem to do a better job than khan academy
@brianmclogan
5 жыл бұрын
So happy I could help!!
@YungYorii
5 жыл бұрын
Sasuke why are you here
@kit-kattaylorzz4199
4 жыл бұрын
i agree, and i love ur pfp
@thatguymos
4 жыл бұрын
Jordan xu ha nice pfp
@mofon893
4 жыл бұрын
More like all the time
1:32, he is like THESE DANG KIDS, I DON'T GET PAID ENOUGH FOR THIS
@SaylorMP
3 жыл бұрын
He’s trying to take a video too😭😂
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
2 жыл бұрын
yeah and reminds me of my 11th grade Math teacher who was always strung out on coke
@hekzter3895
2 жыл бұрын
@@penelopeclotineVera what the FUCK
@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
2 жыл бұрын
@@joanl.7543 i bet your fun at parties
@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.
I wish you were my math teacher 😢
justin is pissing me off
@paperchasindude6578
5 жыл бұрын
Justin from 13 reasons why
@vanessajeanclaude
3 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.❤️
Lol second video I’ve watched of yours and Justin was distracting the class in both videos
@jacquesirby3597
4 жыл бұрын
What was the other video
Justin needs to appreciate that he has this guy as a tracher
@dede0577
3 жыл бұрын
Tell me abt it!!
@jonahwilliams4511
3 жыл бұрын
A tracher
1:34 is my teacher when we say we dont understand anything that hes saying for the millionth time
@smith6836
2 жыл бұрын
especially me
cmon justin just be quiet im tryna learnnnnn edit: Justin: interupts like 5 times Brian McLogan: *epic sigh* 1:33
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.
Brian thank you so much I would never be able to do this without your explanation Your awesome 😎
Thank you so much! You are such a good teacher! I hope you are still teaching!!!!!!!!!
You saved me I finally understand!!! My teacher doesn't explain the lesson that good and you made it so easy!
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
6 жыл бұрын
you are very welcome! best of luck!
@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
4 жыл бұрын
@@el.950 im in 8th my man
@diegodiaz3356
3 жыл бұрын
Saarländer me too wtf that guy talking about
@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.
thank you, you have no idea how many times you've helped me!
This video is very useful!! It's very lucky to have such videos.
0:16 when moto moto looks at u
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.
I have a grudge against substitution
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 😂
Watching your videos has made studying for my finals a lot easier.
Who gave this video a thumbs down?best video I've seen so far.
@litzyt6049
5 жыл бұрын
Justin
@jessielizabethk
3 жыл бұрын
@@litzyt6049 lmao
@rachelhomie4336
3 жыл бұрын
I'm saying
@rachelhomie4336
3 жыл бұрын
I'm saying
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!!!!!!!!
How do we know if we should add or subtract the equations after matching up an x or y
Yessss. BecAuse of you, I finally understood it! Many blesses for your teaching
Can you multiply both equations if one of the coefficients can’t get to the other?
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
Thx so much I watch this at night and did my hw with ease all thanks to you
🌟 Very Good, Brian McLogan, Keep It Up 🌟
Thank you, thank you, thank you. This helped me so much. 👏🏾
@brianmclogan
6 жыл бұрын
you are very welcome!
Bless this channel 😌
I love when you have to manage the class. I feel ya buddy....
Really nice explanation of solving an equation system.
Only reason I'm even understanding stuff in math thank you
@reamn
3 жыл бұрын
Go to edu Rising sun channel
Thank you so much for the help ‼️‼️‼️‼️‼️
@brianmclogan
5 жыл бұрын
you are very welcome!
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
If you never exist I wouldn’t figure this equation out. Nice job bro from Thailand 🇹🇭❤️
1:26 wow that takes me back lmao. The shush and the face palm and sigh and everything lol
@brianmclogan
Жыл бұрын
Remix
This is well explained and easy to understand...Can you be my instructor!!
I actually understand this now!
Thanks!
@brianmclogan
6 жыл бұрын
you are very welcome!
Thank you brother
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
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^°^
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
Hi sir, quick question. How did you get the -3 in x -3y=9
I think you need more Aspirin.
thanks sir!
your going to help me pass my math test
explaination on point bro😃👍👍
@brianmclogan
6 жыл бұрын
cheers!
Thankyou so much for this
@the-satisfying1486
3 жыл бұрын
💜💜
I’m in 8th grade and am learning this today, thanks for the extra help.
@xburkez
4 жыл бұрын
Bhoulets I have a quiz tomorrow on it
@oqqrc1437
4 жыл бұрын
x Burkez u got it this bro, remember to study!
@xburkez
4 жыл бұрын
Bhoulets thanks I still am lmao how did u do
@evie5375
3 жыл бұрын
i'm in 11th grade and can confirm it is still helpful in high school.
thank you so much
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.
Wow an education with a lot of comments I use to see vids with 5 or not even 1 comment
How do you know what to multiply the equation by?
@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
6 жыл бұрын
Thank you so much you’re awesome!
@brianmclogan
6 жыл бұрын
you are very welcome!
My teacher uses khan academy and no one gets what they say. I’m going to recommend this brilliant guy to my algebra teacher
tysm for teaching
GG for teaching for so long!!
does justin know that 92k people got mad at him?
❤❤❤Brooo! Tysm!!!
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
@2:07 2y-3y is not 5y ?? isn't it -1 please correct me sir.
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
You saved my math grade
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
Damn...this is actually starting to make sense to me
There'll always be those who just keep talking.. U students lucky!!😖
God dammit justin I had to rewind 3 times because you keep making me lose my train of thought
Aren’t you suppose to mutiply it by a negative 3 because both can’t be positives 🤔
@SA-Entertainment38
5 жыл бұрын
he did later @5:03
Justin a fool with it 🤣 😂
Can you please eliminate this 15 a+b=2 and 2a-b=15 I am confused
@ 0:28 my friend justin is just cracked at fortnite my guy.
God dammit Justin pay attention
damn it justin
What school? Imma see if I can get into your class 🏃💨👀
My friends are doing Khan Academy buttt... I am still stuck a long way back😭😭
@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
1:27 - 1:31 He lagged
Justin, please focus I'm trying to study for my quiz in 20 minutes.
teacher: punches justin in his face
1:33 me after finishing school
Dammit Justin LISTEN
I score 49% but after this video I scored 87% with just 1 video before I entered in the exam
I Wish that you were my teacher
I hope Justin is doing well now 8 years later
What grade is this
poor justin LMAO
Damnit justin...
this kids don't realize how lucky they are
Dang it justin
@brianmclogan
2 жыл бұрын
Haha
solve using a coefficient of 3000
yo is justin ok?
A little bit of zoom on your working out.....
Justin!!!!!
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)
damnit justin
Is he alive bro?
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.