Activity Overview
In this activity, students learn to solve a system of equations using the substitution method.

Before the Activity

See the attached PDF file for detailed instructions for this activity
Print pages 31 - 34 from the attached PDF file for your class
Solve for x and y in a system of equations using the substitution method and verify graphically

During the Activity
Distribute the pages to the class.
Follow the Activity procedures:

Define the equations of the system as eq1, eq2, and eq3
Solve eq1 for z and solve eq2 for y
Record both the equations
Solve eq3 for x and record the value of x
Redefine values of y and z and record the results
Enter the values of x, y, and z in each of the equations and verify the results
Observe that the values of x, y, z satisfy each equation, since the left side of each equation has the same value as the corresponding right side
Solve other system of equations using the substitution method

After the Activity
Students complete the Student Activity sheet.
Review student results:

As a class, discuss questions that appeared to be more challenging
Re-teach concepts as necessary