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: 40

Answer

$\frac{13b-4a}{ab}$.

Work Step by Step

In order to add or subtract fractions, we start by making a common denominator (bottom of the fraction). Thus, we multiply 13/a by b/b and 4/b by a/a to obtain: $\frac{13b}{ab}$-($\frac{4a}{ab}$)=$\frac{13b-4a}{ab}$.
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