Intermediate Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-894-7
ISBN 13: 978-0-13417-894-3

Chapter 4 - Section 4.3 - Equations and Inequalities Involving Absolute Value - Exercise Set - Page 283: 15



Work Step by Step

Given: $3|2x-1|=21$ This can also be written as: $|2x-1|=7$ As per definition of absolute value, we have $2x-1=7$ and $2x-1=-7$ Thus, $2x=8 \implies x=4$ and $2x=-6 \implies x=-3$ Hence, {$-3,4$}
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