Answer
See below.
Work Step by Step
The error is that the student didn't check whether the solution satisfied the second equation. It in fact doesn't satisfy it because $0+2(-1)-2\ne6$.
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 3 Linear Systems and Matrices - 3.1 Solve Linear Systems by Graphing - 3.1 Exercises - Skill Practice - Page 156: 16
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