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)
College Algebra 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
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 - Page 446: 8
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