Answer
$(2,-1)$
Work Step by Step
Green line:$x+y=1$
Purple line: $-x+y=-3$
$-x+y=-3$
$y=x-3$
$x+y=1$
$x+(x-3)=1$
$2x-3=1$
$2x=4$
$2x/2=4/2$
$x=2$
$x+y=1$
$2+y=1$
$y=-1$
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 290: 12
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