To solve the equation \( S = 2LW + 2LH \) for \( L \), we need to isolate \( L \) on one side of the equation. We can factor out \( L \) from the terms on the right-hand side and then divide both sides by the remaining expression to solve for \( L \).
Step 1: Rearranging the Equation
We start with the equation given by \( S = 2LW + 2LH \). Our goal is to solve for \( L \).
Step 2: Factoring Out \( L \)
We can factor \( L \) from the right-hand side of the equation:
\[
S = 2L(W + H)
\]
Step 3: Isolating \( L \)
To isolate \( L \), we divide both sides of the equation by \( 2(W + H) \):
\[
L = \frac{S}{2(W + H)}
\]
Final Answer
Thus, the solution for \( L \) is given by:
\[
\boxed{L = \frac{S}{2(W + H)}}
\]