Question

For the function f(x)=1/3x−4, find the value of x for which f(x)=x

Answer 1

plz help asap!!!

Answer 2

y = (1/3)x-4
so x = 3(y+4)
f^(-1)(x) = (3(x+4))
f(f^(-1)(x)) = f(3(x+4)) = (1/3)(3(x+4)) -4 = (1/3)(3x+12)-4 = x+4-4 = x

Answer 3

or
(1/3)x - 4 = x
(1/3)x - x = 4
x((1/3)-1) = 4
x = 4/(-2/3) = -6

Answer 4

-6 is the answer thank you

Answer 5

yeah I read it wrong the first time.