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Glencoe Math: Course 2, Volume 2 View details

1. Solve One-Step Addition and Subtraction Equations

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Exercise 3 Page 441

Use the Addition Property of Equality to eliminate the subtraction.

s=17

Practice makes perfect

To solve the equation, we have to isolate s on one side. Using the Addition Property of Equality, we can add 8 to both sides of the equation. This will eliminate subtraction on the left-hand side and isolate s.

s-8=9

AddEqn

LHS+ 8=RHS+ 8

s-8+ 8=9+ 8

AddTerms

Add terms

s=17

To check that this solution is correct, let's substitute s=17 into the original equation and simplify.

s-8=9

Substitute

s= 17

17-8? =9