Intermediate Algebra: Connecting Concepts through Application

Published by Brooks Cole
ISBN 10: 0-53449-636-9
ISBN 13: 978-0-53449-636-4

Chapter 1-6 - Cumulative Review: 13

Answer

$b = 13, -27$

Work Step by Step

$| b + 7 | = 20$ $b = 20 - 7$ $b = 13$ $-(b + 7) = 20$ $-b - 7 = 20$ $-b = 20 + 7$ $-b = 27$ $b = -27$ Check: When $b = 13$ $| 13 + 7 | \overset{?}{=} 20$ $20 = 20$ When $b = -27$ $| -27 + 7 | \overset{?}{=} 20$ $| - 20 | \overset{?}{=} 20$ $20 = 20$
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