Answer
(10, -12)
Work Step by Step
Multiply the second equation by -4
-4x + 20y = -280
Add to first equation
4x + 2y = 16
-4x + 20y = -280
22y = -264
y = -12
Plug y = -12 into 4x + 2y = 16
4x + 2(-12) = 16
4x = 40
x = 10
Solution is (10, -12)
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: 36
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