Learn Algebra 1 Substitution Method

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Learn how to use the substitution method to solve systems of equations in this free math video tutorial by Mario's Math Tutoring. This lesson is one of the free lessons in the Learn Algebra 1 video course for sale.

00:00 Intro
0:08 What is a Solution to a System of Equations
0:36 Introductory Example Solving Using Substitution Method
2:26 Example 1 Solve 3x+2y=10, 2x-y=10
2:32 Identify One of the Variable to Solve for and Rewrite Equation
3:04 Substitute Into 2nd Equation
4:19 How to Check the Solution
4:56 Example 2 7x-2y=-1, x+3y=13
6:38 Example 3 (1/2)x+(1/5)y=(-3/10), (3/10)x+(1/10)y=(-1/5)
6:48 How to Clear the Denominator
8:39 Example 4 0.7x-0.9y=-3.2, 0.1x + 0.2y = 0.2
8:43 How to Clear the Decimals
10:19 Example 5 Story (Word) Problem
11:03 Hint for Picking a Variable

Learn Algebra 1 Lesson by Lesson in my "Learn Algebra 1" video course for sale. 87 Lessons teaching you step by step Algebra 1. Check out the 13 free lessons(1 from each chapter)

* Organized List of My Video Lessons to Help You Raise Your Scores & Pass Your Class. Videos Arranged by Math Subject as well as by Chapter/Topic. (Bookmark the Link Below)

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Teaches in under a minute. What a legend. I got this with the first example. you are a legend.

purpledino

So much better than school! Instead of just blatantly saying what to do, you actually try to help viewers understand! Thank you for helping

mial

Thank you so much. This helped me with substitution. I searched everywhere for videos about this. When I found this video, I understood it. You are very good at teaching.

abandonedaccount

Shucks, this is my firsts year of algebra, and oh! Im so glad I found you.The Lord is good!

thisabundantlife

amazing! My teacher was too fast and not clear. This really helps

hashir

i got covid and although im good with math i wasnt in class when we learned this and you just taught it to me in 2 minutes instead of 45 thanks king

blxby

Thank you so much. This really helped me with my math homework.

fredsmith

How is this so much more understandable than my actual math teacher?

corruptedsoul

Thx you make it much more simple than it is

hatimlaaroussi

I got a question: For number 1 you could have just added too right cause -y and +y = 0 and that's what we are always tryanna do in the equation always trying to get one of the variables to cancel out soyou could have added and then divided right?

thestrivinggamer