Answer
$\frac{S-2LH}{2(H+L)}$
Work Step by Step
Start from the given formula, we have $S=2HW+2LW+2LH \longrightarrow S-2LH=2W(H+L) \longrightarrow
\frac{S-2LH}{2(H+L)}=W$ thus, we have $W=\frac{S-2LH}{2(H+L)}$
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter 1 - Equations and Inequalities - Test - Page 181: 15
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