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 447: 43

Answer

(-3, -7)

Work Step by Step

Multiply the first equation by -2 -16x + 6t = 6 Multiply the second equation by 3 15x - 6t = -3 Add both equations together -16x + 6t = 6 15x - 6t = -3 -x = 3 x = -3 Plug x = -3 into 15x - 6t = -3 15(-3) - 6t = -3 -6t = 42 t = -7 Solution is (-3, -7)
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