Respuesta :

Answer:

The answer is 8 .

Step-by-step explanation:

f(x)=36

36=3x+12

36-12 and 12 -12

36-12=24

24 divided by the 3 that left in the equation equals 8 .

36=3x+12

-12       -12

24=3x

divided 24 by 3 and get 8

The answer should be 8