Answer
$f^{-1}(x)=7(x+2)$
Work Step by Step
The operations done to the variable $x$ are: 1) divided by $7$ 2) subtract $2$.
To find the inverse, simply apply the inverse operations, in reverse order, to
$x$ : 1) add $2$ 2) multiply by $7$.
Thus $f^{-1}(x)=7(x+2)$
