College Algebra (6th Edition)

Published by Pearson
ISBN 10: 0-32178-228-3
ISBN 13: 978-0-32178-228-1

Chapter 5 - Systems of Equations and Inequalities - Exercise Set 5.1 - Page 528: 49

Answer

$(\frac{1}{a}, 3)$

Work Step by Step

Multiply ax + 7y = 22 by 5 5ax + 35 y = 110 Subtract this from the other equation. 5ax + 35y = 110 5ax + 4y = 17 You get: 31y = 93 y = 3 Plug y into 5ax + 4y = 17 5ax + 12 = 17 5ax = 5 x = $\frac{1}{a}$
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