Answer
The first expression has a simplified expression of 5x-12.
Explanation
Distribute all of the expressions and subtract 7x.
Expression 1
3(4x-4)-7x
12x-12-7x
5x-12
Expression 2
-3(4x-4)-7x
-12x+12-7x
-19x+12
Expression 3
3(-4x+4)-7x
-12x+12-7x
-19x+12
Expression 4
-3(-4x-4)-7x
12x+12-7x
5x+12
