Solving Systems of Equations Using Elimination

Tutoring on Solving Systems of Equations Using Elimination

Learning Objectives:

Understand to Solve Systems of Equations using Elimation

Math Tutoring on Solving Systems of Equations Using Elimination

In this method multiply one or both of the equations by the appropriate numbers so that one of the variables will have the same coefficient with opposite signs. Add the two equations together because one of the variables had the same coefficient with the opposite sign and will be eliminated when added to the other equation. Then solve the resulting equation and substitute this answer back into one of the original equations to find the remaining variable. Following are the steps:

1. Line up” the variables.

2. Determine which variable to eliminate. Make coefficients opposites.

3. Add straight down, one variable should be eliminated.

4. Solve the resulting equation.   

5. Substitute this result into either of the original equations. 

6. Solve the variable to find the ordered pair solution

7. Check the solution in both original equations.

 

 

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Hook Questions:

1.    What are the different methods to solve the system of equations? 

2.    Why is this method known as the method of elimination? 

3.    Is it necessary to check the result, if so then why?

 

 

 

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