Question

(01.02) Given the function f(x) = 5(x+4) ? 6, solve for the inverse function when x = 19.

Answer 1

Hope you can see my workout in the picture I attached below.

f⁻¹(x) = $\frac{x - 20}{5}$

AND

f⁻¹(19) = $- \frac{1}{5}$