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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 3 Page 440

Use the Addition Property of Equality to eliminate the subtraction.

c=-1

Practice makes perfect

To solve the equation, we have to isolate c on one side. Using the Addition Property of Equality, we can add 6 to both sides of the equation. This will eliminate subtraction on the right-hand side and isolate c.

-7=c-6

LHS+ 6=RHS+ 6

-7+ 6=c-6+ 6

Add terms

-1=c

Rearrange equation

c=-1

To check that this solution is correct, let's substitute c=-1 into the original equation and simplify.

-7=c-6

c= -1

-7? = -1-6

Subtract term

-7=-7 ✓

Because the left-hand side and right-hand side are equal, c=-1 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