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: 44

Answer

u = 25 v = 1

Work Step by Step

Multiply the first equation by 3 3u - 90v = -15 Add to the second equation 3u - 90v = -15 -3u + 80v = 5 -10v = -10 v = 1 Plug v = 1 into 3u - 90v = -15 3u - 90 = -15 3u = 75 u = 25
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