Answer
$Substitution$
Work Step by Step
By definition: Solving the system of equations for one variable, and based on that solving for the other variable(s) is substitution.
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 9 - 9.1 - Linear and Nonlinear Systems of Equations - 9.1 Exercises - Page 635: 2
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