Question

Let f(x) = 7x - 13. Find f-1(x).

Answer 1

`f(x)=7x-13 \\ \\ y=7x-13 \ \ \ |+13 \\ y+13=7x \ \ \ |/ 7 \\ x=(1)/(7)y+(13)/(7) \\ \\ \boxed{f^(-1)(x)=(1)/(7)x+(13)/(7)}`