Intermediate Algebra: Connecting Concepts through Application

Published by Brooks Cole
ISBN 10: 0-53449-636-9
ISBN 13: 978-0-53449-636-4

Chapter 2 - Systems of Linear Equations and Inequalities - Chapter Test - Page 213: 8

Answer

(12,-2)

Work Step by Step

x+7y=-2 x=-7y-2 Substitute the equivalent of x into the other given equation. 3x+y=34 3(-7y-2)+y=34 -21y-6+y=34 -20y=34+6 -20y=40 y=-2 Now that we have the answer for the y-value, plug it back into one of the original equations to find the answer for the x-value. x=-7y-2 x=-7(-2)-2 x=14-2 x=12 Therefore the answer is (12,-2).
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