Answer
\[L=\frac{A}{W}\].
Work Step by Step
The provided formula is \[A=LW\] and now solve the formula for \[L\] by dividing both the sides by \[W\]
\[\begin{align}
& A=LW \\
& \frac{A}{W}=\frac{L}{{}} \\
& L=\frac{A}{W}
\end{align}\]
The formula \[A=LW\]is for the area of rectangle, where \[A=\]area of rectangle, \[L=\]length of the side, and\[W=\]width of the adjacent side.
The formula is \[L=\frac{A}{W}\].