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 - Page 446: 28

Answer

(-2, -12)

Work Step by Step

Multiply the second equation by -3 -27x + 3y = 18 Add to the first equation 4x - 3y = 28 -27x + 3y = 18 -23x = 46 x = -2 Plug x = -2 into 4x - 3y = 28 4(-2) - 3y = 28 -8 - 3y = 28 -3y = 26 y = -12 Solution is (-2, -12)
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