Substitution Method to Solve a System of Equations

Learn how to solve a system of linear equations with two equations two variables using the substitution method in this video math tutorial by Mario's Math Tutoring. We go through two examples to help you learn this technique.

Example 1:
2x-y=7
x=4+y

Example 2:
5x+2y=-1
3x+y=-1

Related Videos to Help You Succeed!:

Elimination Method

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I DID A TUTOTRING SESSION YESTERDAY FOR OVER 1 HOUR ON THIS! YOU EXPALINED AND I GOT IT IN LESS THEN 5 MINS!!!! THANK YOU SO MUCH!!!!1

[annaannaanna]

i love u mario i’m failing rn but u make things make sense i’ll be back when i’m studying for my final

[dominosleftfoot]

You’ve untangled my brain and made everything so clear, I love you forever

[CryptoZxch]

Omg Thank You so Much my algebra teacher isn’t really that good at teaching us algebra and I always struggle.

[axton_alam_narz]

much more simple then how my teacher explains it. Thank u!

[faisalmarzaq]

This helped a lot since I have a math exam today thanks

[Itsjaihhh]

I have a question, what should we look for when deciding to use the elimination or substitution method?

[JordanOffner]

Thank you for making substitution more easier

[Aurora]

Over a month into high school and I already want to quit

[ParisianLex]

Thank you so much for making this 10X easier !! My math teacher just yaps and doesn’t really explain it like you do!!

[MMJface]

OH MY GOSH THANK YOU YOU ARE LITERALLY THE ONLY VIDEO THAT MADE SENSE

[Mercurzzzz]

I got lost in class after solving the first equation, and now I can go back and do the other half of all my homework!

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THANK YOU MY TEACHER DID NOT HELP ME, YOU ARE A LIFE SAVER

[Cosmic_Nova]

This guy is amazing- I have a test tomorrow tysm

[nimismohan]

Thankyou so much sir I was having a doubt in this question and now I feel easy

[RAJMtrue]

yay! finally a succinct and well explained video. Thank yoU!

[coramontgomery]

Brought my algebra grade up 10%, you the goat

[brigadierboa]

this is so clear and easy to understand, thank you so much!

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[lucilledemarco]

What happened to the 2x in problem 1 and how did it all of the sudden become not X and then Y