Intermediate Algebra (6th Edition)

Published by Pearson
ISBN 10: 0321785045
ISBN 13: 978-0-32178-504-6

Chapter 4 - Cumulative Review - Page 252: 21

Answer

$x=1 \text{ or } x = -1$

Work Step by Step

Subtract 5 to both sides to have: $\\\\|2x|=2$ $\\\\\\$RECALL: $\\\\|a| = a \text{ if }a \ge 0 \\|a| =-a \text{ if }a \lt 0$ $\\\\\\$Use this definition of absolute value to have: $\\\\2x=2 \text{ or } 2x = -2 \\\\x = \frac{2}{2} \text{ or } x = \frac{-2}{2} \\\\x = 1 \text{ or } x = -1$
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