Systems of Equations: Elimination Method

50 Minute Class, Algebra 1, Curriculum

Learning Goal: Build procedural fluency with solving systems by elimination.


3 Act Math:

Classwork:

Finished Early?


Standards:

  • Common Core
    • HSA.REI.C.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.
    • HSA.REI.C.6 – Solve systems of linear equations exactly and approximately (e.g., with graphs), focusing on pairs of linear equations in two variables.
  • TEKS (2015-16)
    • A.2(I) – write systems of two linear equations given a table of values, a graph, and a verbal description
    • A.3(F) – graph systems of two linear equations in two variables on the coordinate plane and determine the solutions if they exist
    • A.3(G) – estimate graphically the solutions to systems of two linear equations with two variables in real-world problems
    • A.5(C) – solve systems of two linear equations with two variables for mathematical and real-world problems

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