6-2(3x-3) =-18

Question

6-6x-6=-18
12x=-6=18=24
12x=24
x=2
check this problem is it right.

Answer 1

no
6-2(3x-3) =-18
6-6x+6=-18
-6 x + 12 = -18
-6 x = - 30
x = 5

check
6 - 2(15-3) = -18???
6 - 24 = -18
-18 = -18 yes, check

Answer 2

6-2(3x-3) =-18
6-6x-6=-18
12x=-6=18=24
12x=24
x=2

Your first step is incorrect. When you multiply two negatives, the answer is a positive.
6 - 6x + 6 = -18

I don't know where you got 12x.

6-2(3x-3) =-18
6 - 6x + 6 = -18
12 + 18 = 6x
5 = x

Check it out by substituting 5 for x in your original problem.