tolong bikinin soal yg pertanyaan nya menanyakan nilai (fog)-1 (1) adalah.. sama pembahasannnya terimakasihhh

jika f(x)=  x + 5
g(x)= 2x - 7
tentukan  (fog)⁻¹ (1) = ..

jwb
(fog)(x)= f { g(x)} = f(2x-7)
(fog)(x)= (2x-7) + 5
(fog)(x)= 2x - 2
.
(fog)⁻¹(2x-2) = x   
(fog)⁻¹(1)= ....

2x -2 = 1
2x = 3
x = 3/2

(fog)⁻¹ (1)= 3/2