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: 18

Answer

x = 4 y = - $\frac{1}{5}$

Work Step by Step

6x - 5y = 25 first equation 18x - 15y = 75 multiply by 3 4x + 15y = 13 second equation ____________________________ 22x = 88 add the equations to eleminate y x = 4 divide by 22 let x = 4 in first equation $6\times4$ - 5y = 25 24 - 5y = 25 - 5y = 1 subtract 24 from both sides y = - $\frac{1}{5}$
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