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# Solving Linear Systems of Equations with Substitution (Day 3 of 3)

Lesson 5 of 9

## Objective: SWBAT solve real world scenarios using systems of equations.

#### Do-Now

*10 min*

Students will complete the Do Now in 5 minutes. I will then ask two students to come up to the board to show their answers to the class. I will select students to solve the system using different methods. I will ask students not to look at each other's work as they solve. After they finish, I will ask the class to analyze their work to see if the students arrived at the same answer.

Next, I will ask a student will read the objective, **"SWBAT solve real world scenarios using systems of equations". **

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#### Guided Notes + Practice

*35 min*

Before beginning new material, I will return the exit cards from our last class to give students an opportunity to review their responses.

**Page One: **We will explore today's guided note sheet. The video below shows how I will present these ideas in front of the class.

#### Resources

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#### Partner Practice

*25 min*

Students will practice solving systems of equation word problems in today's partner activity.

Students will read the scenario on each card, and then match the card with the corresponding equation card. Next, the pair will work together to will derive the second equation. Finally, the students will solve the system using substitution.

**Teaching Note:** This activity needs to be cut out by the instructor before class begins.

#### Resources

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#### Closing

*10 min*

I will ask the students to think of a scenario in their own life where they could create a system of equation to find the solution. Next, a volunteer will be asked to give a short summary of what we learned in class today. Students will then complete an exit card.

#### Resources

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- UNIT 1: Welcome Back! - The First Week of School
- UNIT 2: Linear & Absolute Value Functions
- UNIT 3: Numeracy
- UNIT 4: Linear Equations
- UNIT 5: Graphing Linear Functions
- UNIT 6: Systems of Linear Equations
- UNIT 7: Linear Inequalities
- UNIT 8: Polynomials
- UNIT 9: Quadratics
- UNIT 10: Bridge to 10th Grade

- LESSON 1: Graphing Linear Systems of Equations (Day 1 of 2)
- LESSON 2: Graphing Linear Systems of Equations (Day 2 of 2)
- LESSON 3: Solving Linear Systems of Equations with Substitution (Day 1 of 3)
- LESSON 4: Solving Linear Systems of Equations with Substitution (Day 2 of 3)
- LESSON 5: Solving Linear Systems of Equations with Substitution (Day 3 of 3)
- LESSON 6: Solving Linear Systems of Equations with Elimination (Day 1 of 3)
- LESSON 7: Solving Linear Systems of Equations with Elimination (Day 2 of 3)
- LESSON 8: Solving Linear Systems of Equations with Elimination (Day 3 of 3)
- LESSON 9: Stacking Cups: Systems of Equations Real World Application