Respuesta :

Answer:

2/7

Step-by-step explanation:

-2x + 4 = 12x

4 = 14x

x = 4 / 14 = 2/7

Answer:

-4

Step-by-step explanation:

-2x +4 =12

-2x =12 - 4

-2x =8

-x =8 :2

x=-4