Systems of Equations - Elimination Method

Lesson Prep

Lesson Details

• Duration: 50 minutes

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

Answer Keys

• Link to Answer Keys

Classwork

• Estimation 180 – Day 27 (Andrew Stadel)

• Warm Up

• Notes

• Algebra by Example

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

• 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