Respuesta :

Answer:

-9

Step-by-step explanation:

Answer:

x = -9

Step-by-step explanation:

1/3 (x) 1/3 (-12)

-7 = 1/3x - (-4)

+ 4           +4

------------------------

-3 = 1/3x

---    ------

1/3    1/3

x = -9