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 - Review Exercises: Chapter 8 - Page 571: 24

Answer

$$x=4,\:y=-8,\:z=10$$

Work Step by Step

Solving the equations using matrices, we find: $$ \begin{bmatrix}1&4&3&¦&2\\ 2&1&1&¦&10\\ -1&1&2&¦&8\end{bmatrix}\\ \begin{bmatrix}1&0&0&¦&4\\ 0&1&0&¦&-8\\ 0&0&1&¦&10\end{bmatrix}\\ x=4,\:y=-8,\:z=10$$
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