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: 51

Answer

$\frac{-17}{24n}$.

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 1/6n by 4/4 and 7/8n by 3/3 to obtain: $\frac{4}{24n}$-($\frac{21}{24n}$)=$\frac{-17}{24n}$.
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