Answer
$$z=-1,\:y=5,\:x=-4$$
Work Step by Step
Solving the system of equations using substitution, we find:
$$ 2\left(4-\left(-7z-2\right)+3z\right)-\left(-7z-2\right)+z=-14 \\ z=-1 \\ y=-7\left(-1\right)-2=5\\ x=4-5+3\left(-1\right)=-4$$
Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)
by Bittinger, Marvin L.; Ellenbogen, David J.; Johnson, Barbara L.
Published by
Pearson
ISBN 10:
0-32184-874-8
ISBN 13:
978-0-32184-874-1
Chapter 8 - Systems of Linear Equations and Problem Solving - 8.4 Systems of Equations in Three Variables - 8.4 Exercise Set - Page 537: 12
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