Answer
$x=3,y=4$
Work Step by Step
Given: $x+y=7$ and $x-y=-1$
After adding the given two equations, we have
$2x=6$
or, $x=3$
Now, $3+y=7$
or, $y=7-3=4$
Thus, $x=3,y=4$
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 3 - Section 3.2 - Problem Solving and Business Applications Using Systems of Equations - Exercise Set - Page 204: 1
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