Answer
$$y=8,\:x=-3$$
Work Step by Step
Solving the equation using substitution, we find:
$$2\cdot \frac{-1-y}{3}+3y=18 \\ y=8 $$
Thus:
$$x=\frac{-1-8}{3}=-3$$
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 - 3.2 Solve Linear Systems Algebraically - 3.2 Exercises - Skill Practice - Page 164: 11
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