Fungsi invers dari 2x+3/x+5

f(x) = (2x+3) / (x+5)
y = (2x+3) / (x+5)
y(x+5) = (2x+3)
yx + 5y = 2x + 3
yx - 2x = -5y + 3
x(y - 2) = -5y + 3
x = (-5y + 3) / (y - 2)
f-¹(x) = (-5x+3) / (x - 2)