Precalculus: Mathematics for Calculus, 7th Edition

Published by Brooks Cole
ISBN 10: 1305071751
ISBN 13: 978-1-30507-175-9

Chapter 1 - Section 1.8 - Inequalities - 1.8 Exercises - Page 89: 30

Answer

$[3, 6]$ Refer to the attached image below for the graph.
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Work Step by Step

Add 4 to each part to have: $\\5+4 \le 3x-4+4\le 14+4 \\9 \le 3x \le 18$ Divide 3 to each part to have:; $\\3 \le x \le 6$ Thus, the solution is $[3, 6]$.
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