Algebra: A Combined Approach (4th Edition)

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: 9

Answer

$(3,1)$

Work Step by Step

Green line: $x+y=4$ Purple line: $x-y=2$ $x-y=2$ $x=2+y$ $x+y=4$ $(2+y)+y=4$ $2+y+y=4$ $2+2y=4$ $2y=2$ $2y/2 =2/2$ $y=1$ $x+y=4$ $x+1=4$ $x=3$
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