f(x)= x-1

Question

g(x)= 2x+3
find f(g(x))

please help me !

Answer 1

Given
f(x)=x+1, g(x)=3x+2

then
f(g(x)) [substitute x by g(x)]
=f((3x+2))
=(3x+2) + 1 [ f(x) = g(x)+1 ]

Now proceed with your example, and post your answer if necessary.