G(x+2) = 2x - 6. Nyatakan G(x)!

Mapel : Matematika
Kelas : VIII SMP
Bab : Fungsi

Pembahasan :
G(x + 2) = 2(x + 2) - 10
G(x) = 2x - 10

G (x + 2) = 2x - 6
Misal :
y = x + 2
x = y - 2

G (x + 2) = 2x - 6
G (y) = 2 (y - 2) - 6
G (y) = 2y - 4 - 6
G (y) = 2y - 10
G (x) = 2x - 10