Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 7 - Test: 5



Work Step by Step

Step 1: $\frac{7-x}{x-7}$ Step 2: $\frac{7-x}{-(-x+7)}$ Step 3: $\frac{7-x}{-(7-x)}$ Step 4: Cancelling the expression (7-x) as it is common to both the numerator and denominator, the expression becomes $\frac{1}{-1}=-1$.
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