Elementary Algebra

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

Chapter 4 - Proportions, Percents, and Solving Inequalities - 4.3 - More on Percents and Problem Solving - Problem Set 4.3 - Page 161: 12

Answer

s=80

Work Step by Step

In order to solve for s, we first need to get all of the terms with an s in them on the same side of the equation. Then, we need to isolate s by getting all of the numbers that are on the same side of the equation as s on the other side of the equation. Thus, we obtain: $s=40+.5s \\\\ .5s=40 \\\\ s=80$
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