Answer
$$x=6.
y=-1$$
Work Step by Step
$x=2-4y$
Plugging that in,
$$2*(2-4y)+5y=7$$
$$4-8y+5y=7$$
$$-3y=3$$
$$y=-1$$
$$x=2-4y=2+4=6$$
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: 3
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