Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson
ISBN 10: 0-32184-874-8
ISBN 13: 978-0-32184-874-1

Chapter 9 - Inequalities and Problem Solving - Mid-Chapter Review - Mixed Review - Page 602: 3

Answer

$$x=-15\quad \mathrm{or}\quad \:x=15$$

Work Step by Step

Since the value inside the absolute value can be positive or negative and get the same number, we must consider both options. Doing this, we find: $$ \left|x\right|=15\\ x=-15\quad \mathrm{or}\quad \:x=15$$
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