Solving Linear Equations Part 4

Sick of ads?‚Äč Sign up for MathVids Premium
Taught by YourMathGal
  • Currently 4.0/5 Stars.
8169 views | 1 rating
Part of video series
Meets NCTM Standards:
Lesson Summary:

In this video, the addition property of equality is used to solve problems. The lesson covers an example of solving equations with a minus sign in front of the variable, such as -x=b, and how taking the opposite of both sides can help in these problems. In addition, the video shows how changing the signs of all the terms can make the equation easier to solve. The lesson concludes with a challenging problem that requires simplifying both sides of the equation and combining like terms to find the variable's value.

Lesson Description:

Part 4 of Solving Linear Equations in one variable. Covers examples solving equations using the addition property of equality, and solving -x = b, etc.

More free YouTube videos by Julie Harland are organized at

Questions answered by this video:
  • How do you solve a linear equation when the variable is negative?
  • How do you solve -x = 5 or -x = -4 and check your solution?
  • How do you take the opposite of an expression?
  • How do you solve -2x + 3 = -x - 9 and check your solution?
  • How do you get rid of the negative sign in front of a variable in an equation?
  • How do you solve 3 - x = 7 and check your solution?
  • What happens if your solution does not check when you are checking your answer to an equation?
  • How do you solve 2(x + 2) - 8 = 4(2x - 3) - 5(x + 1)?
  • Staff Review

    • Currently 4.0/5 Stars.
    This lesson explains how to solve an equation like -x = 5, where the variable is negative. Multiple methods of solving several different problems are shown step by step.