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 - 8.6 Elimination Using Matrices - 8.6 Exercise Set - Page 551: 13



Work Step by Step

Solving the system of equations using Matrices, we find: $$ \begin{bmatrix}3&2&2&¦&3\\ 1&2&-1&¦&5\\ 2&-4&1&¦&0\end{bmatrix}\\ \begin{bmatrix}1&0&0&¦&2\\ 0&1&0&¦&\frac{1}{2}\\ 0&0&1&¦&-2\end{bmatrix}\\ x=2,\:y=\frac{1}{2},\:z=-2$$
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