you have to use distributive property

Better Simplify the parenthesis first. It becomes important when things get more complicate.

3 ( -2 + X + 4 ) = 3 ( X + 2) = 3X + 6

Like:

5 - 3 ( -95 + 75 + X)= 5 - 3 ( -15 + X) = 5 + 45 -3X = 50 -3x

You don't have to multiply 3 by 95& 75.