## Prove that, given a system of two equations in two variables, replacing one equation by the sum of that equation and a multiple of the other produces a system with the same solutions.

26 Lesson(s)

Algebra I » Unit: Systems of Linear Equations
Washington, DC
Environment: Urban

Big Idea:

#### Students will identify zero pair coefficients to solve systems of equations by adding.

Standards:

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Reflections (1)

Algebra I » Unit: Systems of Linear Equations
Washington, DC
Environment: Urban

Big Idea:

#### Students use data to create equations describing a concrete scenario. Students analyze the equations as a system to solve a problem.

Standards:

Favorites (93)

Resources (30)

Reflections (5)

Algebra I » Unit: Systems of Linear Equations
Washington, DC
Environment: Urban

Big Idea:

Standards:

Favorites (22)

Resources (18)

Reflections (1)

### Bring in the Sub!: Solving Systems of Equations in 2 Variables

Algebra I » Unit: Making Informed Decisions with Systems of Equations
Algebra I » Unit: Making Informed Decisions with Systems of Equations
Salem, MA
Environment: Urban

Big Idea:

#### Students complete group work on engaging real-world problems and provide constructive feedback to their peers through a gallery walk!

Standards:

Favorites (3)

Resources (22)

Reflections (2)

Algebra I » Unit: Systems of Equations
Rogers, AR
Environment: Rural

Big Idea:

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Favorites (3)

Resources (8)

### Define, Set, Go!

Algebra I » Unit: Systems of Equations
Algebra I » Unit: Systems of Equations
Rogers, AR
Environment: Rural

Big Idea:

Standards:

Favorites (2)

Resources (11)

Reflections (1)

### Job Offers and Cell Phone Plans: Making Informed Decisions with Mathematics

Algebra I » Unit: Making Informed Decisions with Systems of Equations
Algebra I » Unit: Making Informed Decisions with Systems of Equations
Salem, MA
Environment: Urban

Big Idea:

Standards:

Favorites (3)

Resources (32)

Reflections (3)

### Elimination with 2 Column Notes

Algebra I » Unit: Systems of Equations
Algebra I » Unit: Systems of Equations
Rogers, AR
Environment: Rural

Big Idea:

#### In this lesson students write 2-column notes as they work to increase retention of process and concepts.

Standards:

Favorites (3)

Resources (10)

Algebra I » Unit: Systems of Linear Equations
Washington, DC
Environment: Urban

Big Idea:

Standards:

Favorites (42)

Resources (20)

Reflections (1)

### Unit Test: Systems of Equations and Inequalities in 2 Variables

Algebra I » Unit: Making Informed Decisions with Systems of Equations
Algebra I » Unit: Making Informed Decisions with Systems of Equations
Salem, MA
Environment: Urban

Big Idea:

Standards:

Favorites (1)

Resources (5)

### Study Session for Unit Test on Systems of Equations and Inequalities in 2 Variables

Algebra I » Unit: Making Informed Decisions with Systems of Equations
Algebra I » Unit: Making Informed Decisions with Systems of Equations
Salem, MA
Environment: Urban

Big Idea:

Standards:

Resources (3)

### Maximizing Profit: An Introduction to Linear Programming

Algebra I » Unit: Systems of Equations and Inequalities
Algebra I » Unit: Systems of Equations and Inequalities
Boston, MA
Environment: Urban

Big Idea:

Standards:

Favorites (3)

Resources (12)

Reflections (1)

### SUPPLEMENT: Linear Programming Application Day 1 of 2

Algebra I » Unit: Systems of Equations and Inequalities
Algebra I » Unit: Systems of Equations and Inequalities
Boston, MA
Environment: Urban

Big Idea:

Standards:

Favorites (2)

Resources (17)

Reflections (2)

### Fitness Center Question

Algebra I » Unit: Systems of Equations
Algebra I » Unit: Systems of Equations
Amherst, NY
Environment: Suburban

Big Idea:

Standards:

Favorites (7)

Resources (12)

Reflections (1)

### Practice Solving Systems Algebraically

Algebra I » Unit: Systems of Equations
Algebra I » Unit: Systems of Equations
Amherst, NY
Environment: Suburban

Big Idea:

Standards:

Favorites (2)

Resources (9)
Common Core Math