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

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: $x-y=-1$ $x-y=-1$ $x=y-1$ $x+y=1$ $(y-1)+y=1$ $2y-1=1$ $2y=2$ $2y/2=2/2$ $y=1$ $x=y-1$ $x=1-1$ $x=0$

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