tentukan invers dari 9 (s) = 2x+5

g(s) = 2x+5
2x = g(s) - 5
x = 1/2 (g(s) - 5)
Maka,
g-1(s) = 1/2 (x-5)

mungkin mksdmu 
g(x) = 2x + 5
x = (y - 5)/2
g⁻¹(x) = (x - 5)/2