Respuesta :

mberisso

Answer:

x = 8

Step-by-step explanation:

if f(x) = -17

then we can type:

- 3 x + 7 = -17

solving for "x", subtract 7 from both sides

- 3 x = - 17 - 7

- 3 x = - 24

divide both sides by -3 to isolate "x"

x = -24 / (-3)

x = 8