Answer
$r=fw$
Work Step by Step
$\bf{\text{Solution Outline:}}$
To solve the given equation, $
w=\dfrac{r}{f}
$ for $
r
,$ use the properties of equality to isolate the variable.
$\bf{\text{Solution Details:}}$
Using the properties of equality to isolate the variable, the equation above is equivalent to
\begin{array}{l}\require{cancel}
w=\dfrac{r}{f}
\\\\
f\cdot w=f\cdot \dfrac{r}{f}
\\\\
fw=r
\\\\
r=fw
.\end{array}