Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 3 - Solving Inequalities - 3-7 Absolute Value Equations and Inequalities - Practice and Problem-Solving Exercises - Page 211: 49


d=9 and d=-9

Work Step by Step

You have |2d+3|=21 and you have to solve it: First, subtract 3 from both sides to isolate the inequality: |2d| = 18 Then, divide both sides by 2 to solve for d: |d|=9 This means that: d=-9 and 9
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