Question

Find the inverse.
f(x) = 3x+28

Answer 1

Set
`y = f^(-1)(x)` and
`f(y) = x`

Interchange the variables
`x` and
`y`

`3y + 28 = x\\3y = x - 28\\y = (x - 28)/(3) \\\\f^(-1)(x) = (x - 28)/(3)`