Question

-2(m-30)=-6m?

Answer 1

First divide both sides by -2
This will give you
m-30 = 3m

Answer 2

Then you must subtract 1m from both sides, leaving you with
-30 = 2m

Answer 3

After you divide each side by 2, you will end up having
-15 = m

Answer 4

or....distribute the -2 through the parenthesis giving you :
-2m + 60 = -6m -- add 2m to both sides
60 = -6m + 2m
60 = - 4m
-60/4 = m
-15 = m

either way you do it, the answer will be the same :)