Dibketahui (fx)=2x-5 dan g(x)=3-x nilai g yang memenuhi (fog)(a)=7 adalah?

semoga bisa membantu

Kelas 10 Matematika
Bab Fungsi Komposisi

(fog) (a) = 7
f(3 - a) = 7
2 (3 - a) - 5 = 7
2 (3 - a) = 7 + 5
3 - a = 12/2
3 - 6 = a
a = -3

g(x) = 3 - x
g(-3) = 3 - (-3)
g(-3) = 6