Answer
$$x=-2,\:y=5$$
Work Step by Step
Solving the system of equations using Matrices, we find:
$$ \begin{bmatrix}3&1&¦&-1\\ 6&5&¦&13\end{bmatrix}\\ \begin{bmatrix}1&0&¦&-2\\ 0&1&¦&5\end{bmatrix}\\ x=-2,\:y=5$$
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 - 8.6 Elimination Using Matrices - 8.6 Exercise Set - Page 551: 9
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