Diketahui f(x)=3x+6 dan g(x)=x-5 maka(f o g)(x)

(fog)(x) = f(g(x)) = 3(g(x)) + 6
f(g(x)) = 3(x-5) + 6 = 3x - 15 + 6
f(g(x))= 3x - 9

kalo gak salah si begini