## Intermediate Algebra: Connecting Concepts through Application

Published by Brooks Cole

# Chapter 7 - Rational Functions - 7.2 Simplifying Rational Expressions - 7.2 Exercises - Page 575: 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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