Answer:
Step-by-step explanation:
we will use distributive property first
-12x-4+x-3=15
-11x-7=15
-11x=15+7
-11x=22
x=22/-11
x=-2
x should equal -2
-4 (3x + 1) + x - 3 = 15
-12x - 4 + x - 3 = 15
-12x + x - 4 - 3 = 15
-11x - 7 = 15
-11x - 7 + 7 = 15 + 7
-11x = 22
-11 ÷ -11x = 22 ÷ -11
x = -2
