Big Ideas Math - Algebra 1, A Common Core Curriculum

Published by Big Ideas Learning LLC
ISBN 10: 978-1-60840-838-2
ISBN 13: 978-1-60840-838-2

Chapter 1 - Solving Linear Equations - 1.4 - Solving Absolute Value Equations - Exercises - Page 34: 59

Answer

$x=1~~~~\text{or}~~~~x=-5$

Work Step by Step

$$8|x+2|-6=5|x+2|+3$$ $$8|x+2|-5|x+2|=6+3$$ $$(8-5)|x+2|=9$$ $$3|x+2|=9$$ $$|x+2|=3$$ $$x+2=3~~~~\text{or}~~~~x+2=-3$$ $$x=3-2=1~~~~\text{or}~~~~x=-3-2=-5$$ Answer is found first by solving equation for $|x+2|$ and then solving for $x$.
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