Question

How to find the inverse of f(x) = 3x - 7​

Answer 1

To get the inverse of this function you need two steps. First, we leave the variable
`x` alone in the function. Finally, write
`f^(-1)(x)` where you see the letter
`x` and
`x` where you see the letter
`y`.

First step:

Leave the variable
`x` alone.

• 
  `y=3x-7`
• 
  `y+7=3x`
• 
  `(y+7)/(3)=x`

Last step:

Make lettering according to the rule above.

• 
  `(x+7)/(3) =f^(-1)(x)`