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: 36

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)
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