Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 1 - Equations and Inequalities - Test - Page 181: 14

Answer

$-6, \frac{4}{3}$.

Work Step by Step

Step 1. Remove the absolute sign to get two cases: $2x+1=5-x$ and $2x+1=-(5-x)=-5+x$ Step 2. For $2x+1=5-x$, we have $3x=4$ thus $x=\frac{4}{3}$ Step 3. For $2x+1=-5+x$, we have $x=-6$ Step 4. The solutions are $x=-6$ and $x=\frac{4}{3}$.
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