## systems_substitution_1_middle.mov - Section 2: Direct Instruction

*systems_substitution1.pptx*

*systems_substitution_1_middle.mov*

Solving Systems of Equations Without a Graph

# Solving Systems of Equations Without a Graph

Unit 3: Systems of Equations

Lesson 7 of 13

Lesson 7 of 13

## Objective: Students will be able to solve a system of equations algebraically by substituting one equation into the other in order to have an equation in one variable. Students will become fluent in this algebraic technique and will conceptually understand the reasoning behind using the substitution technique.

4

#### Closure

*5 min*

Choose one problem from your independent practice and write out in words why you solved it the way you did. List the steps and a reason for each step" If some students in your class struggle with writing they can explain their description to you. This task will determine which students are understanding the substitution method and which students have only memorized the procedure.

*expand content*

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- LESSON 1: Introduction to systems of equations
- LESSON 2: What Does a System of Equations Really Look Like?
- LESSON 3: What is the "Point" of Solving a System?
- LESSON 4: Fitness Center Question
- LESSON 5: Cell Phone Plans
- LESSON 6: How are Systems of Equations related to Equations and Functions?
- LESSON 7: Solving Systems of Equations Without a Graph
- LESSON 8: Practice with the Substitution Method
- LESSON 9: Penny Problem
- LESSON 10: Practice Solving Systems Algebraically
- LESSON 11: Pulling the Systems Concepts All Together
- LESSON 12: An Interesting Lottery
- LESSON 13: Don't Sink The Boat

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