SOLUTION: Define f(x)=3x-8. If f^-1 is the inverse of f, find the value (s) of x for which f(x)=f^-1(x). Thank you.

Algebra ->  Rational-functions -> SOLUTION: Define f(x)=3x-8. If f^-1 is the inverse of f, find the value (s) of x for which f(x)=f^-1(x). Thank you.       Log On


   

Question 919701: Define f(x)=3x-8. If f^-1 is the inverse of f, find the value (s) of x for which f(x)=f^-1(x). Thank you.
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
f(x): y = 3x+ 8
f%5E-1%28x%29: y = (x-8)/3
3x+ 8 = (x-8)/3
9x+ 24 = x-8
8x = -32
x = -4