Find the inverse of f (x) = 2x + 3

f - 1 (x) = x-3 2

Explanation:

Follow the steps:

f (x) = 2x+3

1 - replace f (x) with y →y=2x+3

2 - simply switch x and so the equation looks like x=2y+3

3 - use algebra to solve for y. (isolate y)

x=2y+3

x-3=2y

x-3 2 = y

This is the inverse function and is written as

f - 1 (x) = x-3 2