Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 4 - Section 4.3 - Solving Systems of Linear Equations by Addition - Exercise Set: 8

Answer

x = 2 y = -3

Work Step by Step

4x + 2y = 2 first equation 3x - 2y = 12 second equation __________________ 7x = 14 add the equations to eleminate y x = 2 divide bpth sides by 7 let x = 2 in first equation $4\times2$ + 2y = 2 8 + 2y = 2 2y = 2 - 8 subtract 8 from both sides 2y = -6 y = -3 divide both sides by 2
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