College Algebra (10th Edition)

Published by Pearson
ISBN 10: 0321979478
ISBN 13: 978-0-32197-947-6

Chapter 1 - Review Exercises - Page 145: 28

Answer

$\left\{x|x\gt 14\right\}$ Refer to the graph below.

Work Step by Step

Multiply $10$ to both sides to eliminate fractions: \begin{align*} \require{cancel} 10\left(\frac{2x-3}{5}+2\right)&\le 10\left(\frac{x}{2}\right)\\ 10\left(\frac{2x-3}{5}\right)+10(2)&\le \cancel{10}^5\left(\frac{x}{\cancel{2}}\right)\\ \cancel{10}^2\left(\frac{2x-3}{\cancel{5}}\right)+20&\le 5x\\ 2(2x-3)+20&\le 5x\\ 4x-6+20&\le5x\\ 4x+14&\le 5x\\ 14&\le5x-4x\\ 14&\le x\\ x&\ge 14\end{align*} The solution set is $\left\{x|x\gt 14\right\}$. To graph the solution set, plot a solid dot at $14$ and shade the region to its right. Refer to the graph above.
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