## Elementary Algebra

Published by Cengage Learning

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

#### Answer

$w=6$

#### 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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