1. Section 8.2 Part 2 Solving Systems by Substitution
Pre-Calculus 11
Chapter 8.2 Continued

2. I) Solving by Substitution
When solving by Substitution, isolate a variable from one equation
Then “substitute” that variable into the 2nd equation
Isolate “y” variable from
Substitute equation into
Solve
The intersection is at:

3. Practice: Solve by Substitution
Isolate “y” variable from
Substitute equation into
Solve
Solve for “y” using
Therefore, the solution is:

4. Practice: Solve by Substitution
Isolate “y” variable from
Substitute equation into
Solve
Solve For “y” with:

5. Practice: Solve by Substitution

6. Ex1: Solve:
Substitute equation 1 into 2. 1 2
The Solutions are:

7. Example 2: Solve the System:1 2
Substitute equation 1 into 2.
The Solutions are:

8. Ex3: Solve the System: 1 2 Substitute equation 1 into 2.
The Solutions are:

9. Ex4 Solve the system: 1 2 Substitute equation 1 into 2.
The Solutions are:

10. Ex5: Solve the system: 1 2 The Solutions are:
Substitute equation 1 into 2. 2
The Solutions are:

11. Ex6: Solve the system: 1 2 Substitute equation 1 into 2.
The Solutions are:

12. HW:
Assignment 8.2 Part 2