David W. answered • 05/18/18

I'll help you understand math!

We are missing the rest of g(x).

Even so, let's see if I can help.

Just like f(3) = (3 - 8)/(3 - 7), you replace x with g(x).

g(f(x)) is the other way around.

Calculate both fully and you should end up with x once you combine like terms and divide.

Mario M.

05/19/18