Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 4 - Section 4.3 - Integrated Review - Summary on Solving Systems of Equations - Page 311: 22


Addition method

Work Step by Step

$$ 3x - 2y = -3$$ $$ 6x + 2y = 12$$ A system composed of these equations would be easier to solve using the addition method. Doing that will enable us to immediately cancel the term $(2y)$ since it has opposite signs in the two equations. Then, we will only be left with a single variable to solve: $$ 3x - 2y = -3$$ $$+$$$$ 6x + 2y = 12$$ $$9y=9$$ $$y=1$$
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