f(x) = 3x-4 g(x) = 3-4x (g·f)-¹ (x)=?

[tex]gof = 3 - 4(3x - 4) = 3 - 12x + 16 = - 12x + 19 \\ y = - 12x + 19 \\ 12x = 19 - y \\ x = \frac{19 - y}{12} \\ {gof}^{ - 1} = \frac{19 - x}{12} [/tex]