Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 8 - Coordinate Geometry and Linear Systems - 8.6 - Elimination-by-Addition Method - Problem Set 8.6 - Page 378: 29

Answer

In order to solve a system of equations using the substitution method, we (1) isolate one variable in one of the equations. We then (2) plug the value of this variable into the other equation. We then (3) solve the other equation for the value of one variable. Finally, we (4) use the value of the variable found to find the second.

Work Step by Step

In order to solve a system of equations using the substitution method, we (1) isolate one variable in one of the equations. We then (2) plug the value of this variable into the other equation. We then (3) solve the other equation for the value of one variable. Finally, we (4) use the value of the variable found to find the second.
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