Elementary Linear Algebra 7th Edition

Published by Cengage Learning
ISBN 10: 1-13311-087-8
ISBN 13: 978-1-13311-087-3

Chapter 1 - Systems of Linear Equations - 1.1 Introduction to Systems of Linear Equations - 1.1 Exercises: 12

Answer

$x = -1$ $y = 1$ (-1, 1)

Work Step by Step

$x + 3y = 2$ $-x + 2y = 3$ Add the second equation to the first one $x + 3y - x + 2y = 2 + 3$ $5y = 5$ (divide both sides by 5) $y = 1$ Substitute $y$ in the first equation to get $x$ $x + 3*1 = 2$ $x = -1$
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