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: 4

Answer

x = -3 y = 4

Work Step by Step

x - 2y = -11 first equation -x + 5y = 23 second equation _____________________ 3y = 12 addthe equations to eleminate x y = 4 divide both sides by 3 let y =4 in first equation x - 2y = -11 x - $2\times4$ = -11 x - 8 = -11 x = -11 + 8 x = -3
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