Answer:
x = -9
Step-by-step explanation:
I'm sorry, but I won't be explaining it, however I will show every step.
Let's begin.
4x - 12 = -7x - 111
4x - 12 + 7x = -7x - 111 + 7x
11x - 12 = -111
11x - 12 + 111 = -111 + 111
11x + 99 = 0
11x + 99 - 99 = 0 - 99
11x = -99
11x/11 = -99/11
x = -9
