Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

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: 13



Work Step by Step

Solving the system of equations using substitution, we find: $$ \frac{4-4\left(-\frac{-21z-11}{23}\right)+3z}{3}+2\left(-\frac{-21z-11}{23}\right)-z=-2 \\ z=-6 \\ y=-\frac{-21\left(-6\right)-11}{23}=-5 \\ x=\frac{4-4\left(-5\right)+3\left(-6\right)}{3}=2$$
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