Big Ideas Math Geometry, 2014
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Big Ideas Math Geometry, 2014 View details
5. Measuring and Constructing Angles
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Exercise 59 Page 46

Use the Subtraction Property of Equality to eliminate the addition.

x=32

Practice makes perfect
To solve the equation, we have to isolate x on one side. Using the Subtraction Property of Equality, we will subtract 58 from both sides of the equation. This will eliminate the addition and isolate x.
x+58=90
x+58-58=90-58
x=32