Exercise 11 Page 22

Use the Multiplication Property of Equality to eliminate the minus sign.

y=-8

Practice makes perfect

To solve the equation, we have to isolate y on one side. Using the Multiplication Property of Equality, we will multiply both sides by -1. This will eliminate the minus sign and isolate y.

- y=8

MultEqn

LHS * (-1)=RHS* (-1)

(-1) - y= (-1) 8

MultNegNegOnePar

- a(- b)=a* b

y=(-1)8

MultNegPos

(- a)b = - ab

y=-8

To check that this solution is correct, substitute y=-8 into the original equation and simplify.

- y=8

Substitute

y= -8

-( -8)? =8

NegNeg

- (- a)=a

8=8

Since the left-hand side and right-hand side are equal, y=-8 is the correct solution.

Subchapter links

Check Your Understanding p.22

Practice and Problem Solving p.22-24

H.O.T. Problems p.24

Standardized Test Practice p.25

Spiral Review p.25

Skills Review p.25

Exercise 11 Page 22

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