Answer
The addition method might be preferred since we are working with whole numbers.
Work Step by Step
Since we are working with whole numbers, we can easily manipulate the coefficients to be eliminated.
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 4 - Section 4.3 - Solving Systems of Linear Equations by Addition - Exercise Set - Page 309: 54
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