Tolong dijawabya kawan kawan

no 19)

(fog) (x) = (x+5)/(2(x+5)-3

(fog) (x) = (x+5) / (2x + 7)

(fog)^(-1) (x) =

(-7x+5)/ (2x-1)

no 20)

(goh) (x) =

5-2(3x+2) =

5-6x-4 =

-6x + 1

(fogoh) (x) =

-6x+1-1 =

-6x

(fogoh)^-1(x) =

(-1/6)x

(fogoh) ^-1 (a) = 2

berarti

(-1/6)a = 2

a = 2/(-1/6)

a = 2*(-6)

a = -12