Introductory Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-805-X
ISBN 13: 978-0-13417-805-9

Chapter 9 - Cumulative Review Exercises - Page 685: 3

Answer

$$x \leq 7$$

Work Step by Step

We simplify the inequality first by using the distributive property: $$3x + 9 \geq (5)(x) + (5)(-1)$$ Multiply out the terms: $$3x + 9 \geq 5x - 5$$ Subtract $5x$ from each side of the inequality to isolate variables to one side of the inequality: $$-2x + 9 \geq -5$$ Subtract $9$ from each side of the inequality to isolate constants to the other side of the inequality: $$-2x \geq -14$$ Divide each side by $-2$ to solve for $x$, but remember that we need to reverse the sign when we divide by a negative number: $$x \leq 7$$
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