Texas Education Agency
Texas Gateway: Solving Systems of Equations With Three Variables
Given a system of three linear equations, the student will solve the system with a unique solution.
Texas A&M University
Wtamu Virtual Math Lab: Solving Systems of Linear Equations in Three Variables
This tutorial will show you how to solve a system of linear equations in three variables by using the elimination method. Complete with definitions, example problems with step-by-step solutions, and practice exercises for you to complete...
Math Planet
Math Planet: Algebra 2: Solving Systems of Equations in Three Variables
Get information about solving systems of equations in three variables by viewing examples and a video lesson. [6:35]
Illustrative Mathematics
Illustrative Mathematics: A Rei Pairs of Whole Numbers
The premise of this problem is simple - students must find three whole numbers with three different sums when they are added in pairs. To do this, they set up a system of linear equations in three variables. Aligns with A-REI.C.6.