Solve for l r=e/l

Finding the LCD of a list of values is the same as finding the LCM of the denominators of those values.

The LCM of one and any expression is the expression.

Multiply each term in ${\displaystyle \frac{e}{l}=r}$ by ${\displaystyle l}$.

Simplify the left side.

Rewrite the equation as ${\displaystyle rl=e}$.

Divide each term in ${\displaystyle rl=e}$ by ${\displaystyle r}$ and simplify.