Intermediate Algebra (6th Edition)

Published by Pearson
ISBN 10: 0321785045
ISBN 13: 978-0-32178-504-6

Chapter 2 - Section 2.7 - Absolute Value Inequalities - Exercise Set - Page 106: 81

Answer

$\text{the interval } \left( -\infty,-\dfrac{25}{3} \right)\cup \left( \dfrac{35}{3},\infty \right) $

Work Step by Step

Since $|x|\gt a$ implies $x\gt a \text{ OR } x\lt -a$, then the statement $ |\dfrac{3x-5}{6}|\gt5 $ evaluates to \begin{array}{l} \dfrac{3x-5}{6}\gt5\\\\ 3x-5\gt30\\ 3x\gt35\\\\ x\gt\dfrac{35}{3} ,\\\\\text{OR}\\\\ \dfrac{3x-5}{6}\lt-5\\\\ 3x-5\lt-30\\ 3x\lt-25\\\\ x\lt-\dfrac{25}{3} .\end{array} Hence, the solution set is $ \text{the interval } \left( -\infty,-\dfrac{25}{3} \right)\cup \left( \dfrac{35}{3},\infty \right) $.
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