Intermediate Algebra: Connecting Concepts through Application

Published by Brooks Cole
ISBN 10: 0-53449-636-9
ISBN 13: 978-0-53449-636-4

Chapter 7 - Rational Functions - 7.2 Simplifying Rational Expressions - 7.2 Exercises: 8

Answer

$-\frac{1}{7}$

Work Step by Step

$\frac{3-x}{7x-21}$ $=\frac{x-3}{-7x+21}$ $=\frac{x-3}{-7(x-3)}$ $=-\frac{1}{7}$
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