Respuesta :

Answer:

x=20

Step-by-step explanation:

(12+6)/(8+x-4) =6/8

18/(x+4)=6/8

6(x+4) =(18)(8)

(x+4) =(18)(8)/6

x+4 =(3)(8)

x+4=24

x=-4+24

x=20