Question

5. Find the inverse for the equation f(x) = 7x – 3.

Answer 1

The inverse is (x+3)/7

Explanation:

y = 7x-3

Exchange x and y

x = 7y-3

Solve for y

Add 3 to each side

x+3 =7y-3+3

x+3 = 7y

Divide each side by 7

(x+3)/7 = 7y/7

(x+3)/7 = y

The inverse is (x+3)/7