College Algebra 7th Edition

Published by Brooks Cole
ISBN 10: 1305115546
ISBN 13: 978-1-30511-554-5

Chapter 5, Systems of Equations and Inequalities - Section 5.1 - Systems of Linear Equations in Two Variations - 5.1 Exercises: 8

Answer

(4, -1)

Work Step by Step

Rewrite x + 2y = 2 as x = 2 - 2y. Plug into the other equation 2(2 - 2y) + y = 7 4 - 4y + y = 7 -3y = 3 y = -1 Plug y = -1 into x = 2 - 2y. Plug y = -1 into x = 2 - 2y x = 2 - 2(-1) = 4 Solution is (4, -1)
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