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 162: 49


The answer is below.

Work Step by Step

While it is legal to multiply both sides of the equation by 10, one must multiply all terms by 10. Thus, it should be 12x+20 = 38, not 12x+2=38. After this adjustment is made, the problem can be solved correctly.
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