Intermediate Algebra (12th Edition)

Published by Pearson
ISBN 10: 0321969359
ISBN 13: 978-0-32196-935-4

Chapter 3 - Section 3.1 - Systems of Linear Equations in Two Variables - 3.1 Exercises - Page 227: 44


a) elimination b) substitution c) elimination, after a multiplication

Work Step by Step

a) We simply add the two equations to eliminate the $y$ from the system. b) We substitute $y$ in the second equation with the expression in the first one. c) We have to multiply the second equation by 4, then we have t add the equations to eliminate $y$ from the system.
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