Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter P - Section P.9 - Linear Inequalities and Absolute Value Inequalities - Exercise Set - Page 138: 30

Answer

The solution set is $[2, \infty)$
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Work Step by Step

The idea is to isolate x on one side. Adding, subtracting or multiplying/dividing with a positive number preserves order (the inequality symbol remains). Multiplying/dividing with a negative number inverts the order (the inequality symbol changes) --- $ 8x-2 \geq 14\qquad $ ... $/+2$ $ 8x \geq 16 \qquad $ ... $/\div 8$, (positive) $ x \geq 2$ The solution set is $[2, \infty)$
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