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 - Test: Chapter 8 - Page 572: 3



Work Step by Step

Solving using the elimination method, we obtain: $$ \begin{bmatrix}3x-y=7\\ x+y=1\end{bmatrix}\\ \begin{bmatrix}3x-y=7\\ 3x+3y=3\end{bmatrix}\\ \begin{bmatrix}3x-y=7\\ 4y=-4\end{bmatrix}\\ y=-1,\:x=2$$
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