Is this number a solution - Part 1

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Taught by YourMathGal
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Meets NCTM Standards:
Lesson Summary:

In this lesson, Julie Harland shows how to determine if a number is a solution to a given equation. An equation has an equal sign and the expressions on either side must be equal to each other. If a number is plugged in for the variable in the equation and the left and right sides are equal, then it is a solution. The lesson covers six problems, including equations with variables and fractions. Additionally, students learn how to rewrite equations to simplify the process of plugging in numbers for variables.

Lesson Description:

Determine if a number is a solution to an equation

More free YouTube videos by Julie Harland are organized at

Questions answered by this video:
  • How can you determine if a number is a solution to an equation?
  • How can you know if a solution to an equation is correct?
  • In the equation x - 3 = 8, is 10 a solution?
  • How can you determine whether 5 is a solution of 2x - 1 = x + 4?
  • How do you know whether 6 is a solution of 2/3*x = x - 2?
  • Is 4 a solution of x(x - 2) = x^2 + 5?
  • How can you decide whether 2 is a solution of 2x^2 - 1 = 4x - 1?
  • Is 3/4 a solution of 8x - 1 = 12x + 3?
  • Staff Review

    • Currently 4.0/5 Stars.
    In this lesson, you will find out how to determine whether a given solution is really a solution to an equation. This is a great starting point for learning about equations, because you will learn how to check to see if a solution is correct. Several example problems are done and all parts of the process of checking the solution are explained.