Answer
$y=2x+5$
$\fbox{$x$}=2\fbox{$y$}-5\qquad $interchanging x and y
$\left.\begin{array}{l}
\fbox{$x+5$}=2y\\
\fbox{$\displaystyle \frac{x+5}{2}$}=y
\end{array}\right\}\qquad$ solving for y
$f^{-1}(x)=\fbox{$\displaystyle \frac{x+5}{2}$}$
Work Step by Step
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