Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 3 - Equations and Problem Solving - Chapter 3 Review Problem Set - Page 137: 23



Work Step by Step

Substituting $P=50$ and $l=19$ in the given equation, $ P=2l+2w ,$ we obtain: \begin{array}{l}\require{cancel} 50=2(19)+2w \\\\ 50=38+2w \\\\ 50-38=2w \\\\ 12=2w \\\\ \dfrac{12}{2}=w \\\\ w=6 .\end{array}
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