Elementary Technical Mathematics

Published by Brooks Cole
ISBN 10: 1285199197
ISBN 13: 978-1-28519-919-1

Chapter 6 - Test - Page 264: 14


$$ l=\frac{P}{2}-w.$$

Work Step by Step

We are given: $P=2(l+w)$ To find $l$, we divide both sides by $2$ as follows: $$\frac{P}{2}=\frac{2(l+w)}{2}\Longrightarrow \frac{P}{2}=l+w\Longrightarrow l=\frac{P}{2}-w.$$
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