Math Study Guide

1) -3(x+2)=6

-3(x+2)=6

-3x - 6 = 6

-3x = 12

x = -4

2) 3(-6n-5)=75

-18n - 15 = 75
-18n = 90
  n = -5

3) 6(-x-3)=24

6(-x-3)=24

-6x - 18 = 24

-6x = 42

x = -7

4) -3(4r-8)=-36

-3(4r-8)=-36

-12r + 24 = -36

-12r = -60

r = 5

5) 5x(-3+x)=20

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