Intermediate Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-894-7
ISBN 13: 978-0-13417-894-3

Chapter 1 - Section 1.2 - Operations with Real Numbers and Simplifying Algebraic Expressions - Exercise Set - Page 27: 22



Work Step by Step

Make the fractions similar using their LCD, which is $35$, to obtain: $=-\dfrac{21}{35} - \dfrac{20}{35}$ RECALL: $a-b = a+(-b)$. Thus, $-\frac{21}{35} - \frac{20}{35}=-\frac{21}{35} +\left(-\frac{20}{35}\right)=-\frac{41}{35}$
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