Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 2 - Real Numbers - 2.2 - Addition and Subtraction of Rational Numbers - Problem Set 2.2 - Page 58: 84



Work Step by Step

We first apply the distributive property. Then, we simplify the resultant expression: $\frac{2}{5}a-\frac{2}{7}a$ =$a(\frac{2}{5}-\frac{2}{7})$ =$a(\frac{2(7)-2(5)}{35})$ =$a(\frac{14-10}{35})$ =$a(\frac{4}{35})$ =$\frac{4}{35}a$
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