Respuesta :

jgarzaedu

Answer:

-77/13

Distribute 3 to the ones in the parenthisis  and do the same to the other side and distribute the negative nine. solve what is left and subtract the two terms and simply solve whats next.

ahyer12
Answer: x = 7
3(-4x - 9) - 4 = 8x - 9(x + 12)
-12x - 27 - 4 = 8x - 9x - 108
-12 x - 31 = -x - 108
Add 31 on both side
-12x - 31 + 31 = - x - 108 + 31
-12x = -x - 77
- x from both said
-12x + x = -x -77 + x
-11x = -77
Divide both side of the equation by the same factor
-11x/-11 = -77/-11
X= 7