College Algebra (6th Edition)

Published by Pearson
ISBN 10: 0-32178-228-3
ISBN 13: 978-0-32178-228-1

Chapter 5 - Systems of Equations and Inequalities - Exercise Set 5.1 - Page 527: 45

Answer

2 and 5

Work Step by Step

Write the statements as equations 3x - y = 1 x + 2y = 12 3x - y = 1 can be written as y = 3x -1. Plug this into x + 2y = 12 x + 2(3x -1) = 12 x + 6x - 2 = 12 7x = 14 x = 2 Plug x into 3x - y = 1 3(2) - y = 1 6 - y = 1 5 = y
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