 # Why the Elimination Method Works

#### Primary Type: Video/Audio/Animation

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This chapter presents a new look at the logic behind adding equations- the essential technique used when solving systems of equations by elimination.

### General Information

Subject(s): Mathematics
Grade Level(s): 9, 10, 11, 12
Intended Audience: Students
Suggested Technology: Computers for Students, Internet Connection, Speakers/Headphones

Instructional Time: 11 Minute(s)

Keywords: Linear equations;, constant;, elimination method;, point of intersection;, two variables
Instructional Component Type(s):
Resource Collection: Secondary Math specific existing tutorials

#### Aligned Standards

 Name Description MAFS.912.A-REI.3.5: 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. MAFS.912.A-REI.3.6: Solve systems of linear equations exactly and approximately (e.g., with graphs), focusing on pairs of linear equations in two variables.