Solving Systems of Equations via Substitution
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Lesson Summary:
In this lesson, we learn how to solve systems of equations using the substitution method. The goal is to get either x or y by itself and then replace that variable with the expression in the other equation. We solve for one variable, y in this case, and then plug that into the other equation to find the value of the other variable, x. The final answer is given as an ordered pair.
Lesson Description:
Solving Systems of Equations using the Substitution method.
Courtesy of Mr. Hansen of www.mrhansen.net.
Questions answered by this video:
- What is the substitution method for solving systems of equations?
- How do you solve systems of equations using substitution?
- How do you find the solution to the system 3x - 2y = 8 and x + 5y = -3 using substitution?
- How do you know which variable to get by itself and substitute when solving systems of equations?
- What are the steps for solving systems of equations using substitution?
- How do you get the value of the other variable in a system of equations?
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Staff Review
This video steps through the process of solving a system of equations by substitution, explaining everything as it goes. First, you will learn how to decide which variable to get by itself, then you will learn how to get it by itself, how to replace that variable in the other equation to solve for the second variable, and finally how to use that value to find the first variable. This is a very good explanation of this concept. -
litlarcher
Clearly spelled out, step by step so that you can understand the whole process. Camera a bit shaky - but this was a good lesson overall. Thank you -
