College Algebra (10th Edition)

Published by Pearson
ISBN 10: 0321979478
ISBN 13: 978-0-32197-947-6

Chapter 1 - Section 1.1 - Linear Equations - 1.1 Assess Your Understanding - Page 92: 100


Step (7) is an error because we are dividing by $x-2$, even though $x-2$ is equal to 0.

Work Step by Step

In step (7) it shows both sides of the equation being divided by $x-2$. This is not allowed, because we know that $x=2$ from step (1), which means that $x-2$ is equal to 0. Dividing numbers by 0 is not allowed.
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