Respuesta :

Answer:

X= 2

Step-by-step explanation:

7x + (-4) + x = 12

8x + (-4) = 12

       +4     +4          ( -4 turns to 0)

8x = 16

[tex]\frac{8}{8}[/tex]       [tex]\frac{16}{8}[/tex]

x = 2