Answer
See below
Work Step by Step
Add the first equation to the second:
$4x=-8\\x=-2$
Multiply the third equation by $2$ and add it to the second equation:
$7x+7z=14$
Find $z$: $7(-2)+7z=14\\z=4$
Find $y$: $3(-2)-2y+4=-18\\y=8$
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 9 Quadratic Relations and Conic Sections - 9.3 Graph and Write Equations of Circles - 9.3 Exercises - Mixed Review - Page 632: 74
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