Solving a System of Equations using Substitution

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Taught by mrbrianmclogan
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Lesson Summary:

In this lesson, you will learn how to solve a system of equations using the substitution method. A system of equations consists of more than one equation, and the solution is the point that makes both equations true. To find this solution, you can plug in one equation into the other and eliminate one variable. Then, it's easy to solve for the other variable and find the point where the two lines intersect. This method is helpful when one of the equations has a variable already solved for, making substitution easier.

Lesson Description:

Solving a system of equations by using substitution

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Questions answered by this video:
  • How do I solve a system of equations using substitution?
  • How do I solve: y=4x x+y=5
  • How do I solve: y=4x-1 y=2x-5
  • Staff Review

    • Currently 4.0/5 Stars.
    This lesson gives two examples of how to solve a system of equations using the substitution method.