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 57: 57

Answer

$\frac{63y-20x}{36xy}$

Work Step by Step

To simplify this expression, we first need to find the common denominator (the LCM), which is $36xy$. Therefore, we obtain: $\frac{7}{4x}-\frac{5}{9y}$ =$\frac{7(9y)-5(4x)}{36xy}$ =$\frac{63y-20x}{36xy}$
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