Answer
Answers may vary. One system of equations is
$x+y=1$
$x-y=-1$
Work Step by Step
Green line: $x+y=1$
Purple line: $x-y=-1$
$x-y=-1$
$x=y-1$
$x+y=1$
$(y-1)+y=1$
$2y-1=1$
$2y=2$
$2y/2=2/2$
$y=1$
$x=y-1$
$x=1-1$
$x=0$
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 4 - Section 4.1 - Solving Systems of Linear Equations by Graphing - Exercise Set - Page 294: 68
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