Question

I was hoping that some one could review my answers and tell me if im correct or not ^^
1. -2 (m-30)=-6m
a)-15
b)-13*****
c)-8
d)8


2. 3.75x + 3.7=1.7 + 1.75x
a)10*****
b)-1
c)1
d).1

3.-9 - 6(w+5)
a)-15w + 5*****
b)-15w + 30
c)-6w + 39
d)-6w + 21

Answer 1

1.

- 2 ( m - 30 ) = - 6 m

- 2 m - 2 ∙ ( - 30 ) = - 6 m

- 2 m + 60 = - 6 m

Add 2 m to both sides

60 = - 4 m

Divide both sides by - 4

- 15 = m

m = - 15


2.

3.75 x + 3.7 = 1.7 + 1.75 x

Subtract 1.75 x to both sides

2 x + 3.7 = 1.7

Subtract 3.7 to both sides

2 x = - 2

Divide both sides by 2

x = - 1


3.

- 9 - 6 ( w + 5 ) = - 9 - 6 ∙ w - 6 ∙ 5 = - 9 - 6 w - 30 = - 6 w - 39