Answer
See explanation
Work Step by Step
The substitution method is preferable to the addition method when one or more of the equations has a variable isolated on one side, such as the form x= 5y + 9.
College Algebra (6th Edition)
by Blitzer, Robert F.
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 531: 89
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