Given :

f(x) = 5x + 3, x > 0

g(x) = 3/x , x > 0

gg(x) = x, x > 0

h(x) = 25x + 18, x > 0

express h in terms of one or both f and g.

The answer that I was given is h(x) = 6f(x) - 5 gg(x). Is it possible to also express h as h(x) = f(5x) + 15??

Thank you in advance!