1. Chapter 7 – Solving Systems of Linear Equations
7.2 – Solving Linear Systems by Substitution

2. 7.2 – Solving Linear Systems by Substitution
Today we will learn how to:
Use substitution to solve a linear system
Model a real-life situation using a linear system

3. 7.2 – Solving Linear Systems by Substitution
Example 1
Solve the linear system.
2x + 6y = 15
x = 2y

4. 7.2 – Solving Linear Systems by Substitution
Example 2
Solve the linear system.
3x + y = 5
2x – y = 10

5. 7.2 – Solving Linear Systems by Substitution
STEPS FOR SOLVING A LINEAR SYSTEM BY SUBSTITUTION

6. 7.2 – Solving Linear Systems by Substitution
Example 3
Solve the linear system.
x + 2y = 4
-x + y = -7

7. 7.2 – Solving Linear Systems by Substitution
HOMEWORK
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