Big Ideas Math: Modeling Real Life, Grade 7
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Big Ideas Math: Modeling Real Life, Grade 7 View details
1. Solving Equations Using Addition or Subtraction
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Exercise 46 Page 132

Use the Addition Property of Equality to isolate the absolute value expression.

0
Practice makes perfect
Before we can solve the equation, we need to isolate the absolute value expression. Let's use the Addition Property of Equality.
|x|-2=- 2
|x| - 2 + 2 = - 2 + 2
|x| = 0
An absolute value measures an expression's distance from a midpoint on a number line. |x|= 0 This equation means that the distance is 0. The only solution of this equation is x = 0.