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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 17 Page 443

Use the Addition Property of Equality to eliminate the subtraction.

w=18

Practice makes perfect

To solve the equation, we have to isolate w on one side. Using the Addition Property of Equality, we can add 7 to both sides of the equation. This will eliminate subtraction on the left-hand side and isolate w.

w-7=11

LHS+ 7=RHS+ 7

w-7+ 7=11+ 7

Add terms

w=18

To check that this solution is correct, let's substitute w=18 into the original equation and simplify.

w-7=11

w= 18

18-7? =11

Subtract term

11=11 ✓

Because the left-hand side and right-hand side are equal, w=18 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