Elementary Geometry for College Students (7th Edition)

Published by Cengage
ISBN 10: 978-1-337-61408-5
ISBN 13: 978-1-33761-408-5

Chapter 10 - Section 10.5 - Equations of Lines - Exercises - Page 480: 38

Answer

$(-1,4)$

Work Step by Step

We multiply the two equations by values that will make them cancel a variable when added. Thus, we multiply the upper equation by 5 and the lower equation by 2 and add to find: $31x = -31 \\ x= -1$ We now find y: $5(-1) - 2y = -13 \\ -2y = -8 \\ y =4$
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