Question 1016367
(f o f)(x)=
3/(3/x-8) -8
The denominator is
[3- 8(x-8)]/x-8, putting everything over (x-8) as a common denominator
=(-8x+67)/(x-8)
3/(-8x+67)/(x-8)=3(x-8)/(-8x+67), inverting the denominator.

3(x-8)/(-8x+67)  ANSWER