Exercise 33 Page 443

Use the Addition Property of Equality to eliminate the subtraction.

s=7/18

Practice makes perfect

To solve the equation, we have to isolate s on one side. Using the Addition Property of Equality, we can add 19 to both sides of the equation. This will eliminate subtraction on the left-hand side and isolate s.

s-1/9=5/18

AddEqn

LHS+ 1/9=RHS+ 1/9

s-1/9+ 1/9=5/18+ 1/9

ExpandFrac

a/b=a * 2/b * 2

s-1/9+1/9=5/18+2/18

AddFrac

Add fractions

s=7/18

To check that this solution is correct, let's substitute s= 718 into the original equation and simplify.

s-1/9=5/18

Substitute

s= 7/18

7/18-1/9? =5/18

ExpandFrac

a/b=a * 2/b * 2

7/18-2/18? =5/18

SubFrac

Subtract fractions

5/18=5/18 ✓

Because the left-hand side and right-hand side are equal, s= 718 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 33 Page 443

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