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Glencoe Math: Course 2, Volume 2

GM

Glencoe Math: Course 2, Volume 2 View details

1. Solve One-Step Addition and Subtraction Equations

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Exercise 35 Page 444

Use the Addition Property of Equality to eliminate the subtraction.

x=7

Practice makes perfect

To solve the equation, we have to isolate x on one side. Using the Addition Property of Equality, we can add 15 to both sides of the equation. This will eliminate subtraction on the right-hand side and isolate x.

-8=x-15

LHS+ 15=RHS+ 15

-8+ 15=x-15+ 15

Add terms

7=x

Rearrange equation

x=7

To check that this solution is correct, let's substitute x=7 into the original equation and simplify.

-8=x-15

x= 7

-8? = 7-15

Subtract term

-8=-8 ✓

Because the left-hand side and right-hand side are equal, x=7 is the correct solution.

Subchapter links

Guided Practice p.440

Independent Practice p.441-442

H.O.T. Problems p.442

Standardized Test Practice p.442-444

Extra Practice p.443

Common Core Review p.444