Solving a System with Substitution

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Taught by mrbrianmclogan
  • Currently 4.0/5 Stars.
5893 views | 1 rating
Part of video series
Meets NCTM Standards:
Lesson Summary:

This lesson teaches how to solve a system of equations using substitution. Firstly, pick a variable to solve for, then plug this variable into the other equation. Solving the resulting equation will give the value of the second variable. Finally, plug the value of the second variable into either of the original equations to solve for the first variable. By following these quick and easy steps, a system of equations can be solved using substitution.

Lesson Description:

How to solve a system of equation using substitution

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Questions answered by this video:
  • How do you solve a system of two equations in two variables using substitution?
  • How can you use substitution to solve a system of equations?
  • How do you solve the system 5x + 3y = 12 and x + 2y = 8 using substitution?
  • Which variable should use solve for when solving a system of equations by substitutions?
  • After solving for one variable, how to do you find the value of the other variable in a system of equations?
  • Staff Review

    • Currently 4.0/5 Stars.
    This lesson goes through one entire example of solving a system of equations using substitution. Each step is explained along the way along with a summary of the steps at the end.