Elementary Algebra

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

Chapter 7 - Algebraic Fractions - 7.1 - Simplifying Algebraic Fractions - Problem Set 7.1 - Page 281: 19



Work Step by Step

We first factor the numerator of the fraction: Step 1: $\frac{7-x}{x-7}$ Step 2: $\frac{-1(x-7)}{(x-7)}$ Finally, we cancel out the common factor of $x-7$ to obtain: Step 3: $\frac{-1}{1}$ Step 4: $-1$
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