Exercise 19 Page 443

Use the Addition Property of Equality to eliminate the subtraction.

q=7

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To solve the equation, we have to isolate q 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 right-hand side and isolate q.

-1=q-8

AddEqn

LHS+ 8=RHS+ 8

-1+ 8=q-8+ 8

AddTerms

Add terms

7=q

RearrangeEqn

Rearrange equation

q=7

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

-1=q-8

Substitute

q= 7

-1? = 7-8

SubTerm

Subtract term

-1=-1 ✓

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

Exercise 19 Page 443

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