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: 22

Answer

x = -2 y = 2

Work Step by Step

- 2x + 3y = 10 3x + 4y = 2 multiply by 3 first equation and by 2 second equation and add the equations to eliminate x -6x + 9y = 30 6x + 8y =4 ______________ 17 y = 34 y = 2 divide by 17 both sides let y = 2 in second equation 3x + $4\times2$ = 2 3x + 8 = 2 3x = -6 subtract from -8 x = -2 divide by 3
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