Tolong in dong Bsk di kumpulin No 21 doang pake cara Pliss tolong in

No. 21
f(x) = -2x - 4
g(x) = 10 - 3x/2

(gof)(x)
= g(-2x - 4)
= [tex]10- \frac{3(-2x-4)}{2} [/tex]
= 10 - 3(-x - 2)
= 10 + 3x + 6
= 3x + 16
------------------------------------------------------------
y = 3x + 16
3x = y - 16
x = (y - 16)/3


(gof)⁻¹(x)
= [tex] \frac{x-16}{3} [/tex]

(gof)⁻¹(-2)
= [tex] \frac{-2-16}{3} [/tex]
= -6