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: 6

Answer

x = -3 y= -1

Work Step by Step

4x + y = -13 firat equation 12 x +3y =- 39 multiply by 3 6x - 3y = -15 _______________ 18 x = - 54 add the equations to eleminate y x =- 3 divide both sides by 18 let x = - 3 in first equation $4\times(-3)$ + y = -13 - 12 + y = -13 y = -13 +12 y = -1
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