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: 3

Answer

x = 2 y = -3

Work Step by Step

x - 2y = 8 first equation -x + 5y = -17 second equation ____________________ 3y = -9 add the equations to eleminate x y = -3 divide both sides by 3 let y = -3 in first equation x - 2y = 8 x - 2 (-3) = 8 x + 6 = 8 subtract 6 from both sides x = 2
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