Intermediate Algebra: Connecting Concepts through Application

Published by Brooks Cole
ISBN 10: 0-53449-636-9
ISBN 13: 978-0-53449-636-4

Chapter 2 - Systems of Linear Equations and Inequalities - 2.4 Solving Linear Inequalities - 2.4 Exercises - Page 175: 57

Answer

$x \geq -\frac{9}{2}$

Work Step by Step

Use distributive property on the right side of the inequality: $5x + 3 \geq 3x - 6$ Collect constants on the right side of the inequality by subtracting $3$ from each side: $5x \geq 3x - 9$ Subtract $3x$ from each side to collect variables on the left side of the inequality: $2x \geq -9$ Divide each side by $2$ to solve for $x$: $x \geq -\frac{9}{2}$ Let's check our answer by substituting our value for $x$ into the original inequality to see if our inequality holds true: $5(-\frac{9}{2}) + 3 \geq 3(-\frac{9}{2} - 2)$ Multiply: $-\frac{45}{2} + 3 \geq -\frac{27}{2} - 6$ Add or subtract: $-19.5 \geq -19.5$
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