Posted by **deedee** on Wednesday, November 5, 2008 at 9:05am.

17) Simplify

[32/-8]/-1/2

Answer: -8

18) Add

-7+(-9)

Answer: -16

19)Solve

7(3x -2)=28

Answer:x=2

20)Solve using the addition principle

6.4=x-3.7

Answer:x=10.1

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