Education Technology

Simultaneous Equatons Elimination

Activity Overview

Students are provided with 10 pairs of equations to solve by elimination with the assistance of sliders and a pre-made template to make the process easier to understand. Reducing the number of steps makes the concept easier to understand so that focus can be cast upon the coefficients in the equations.

An extension option includes solving equations with three variables including the 3D representation of the successive results as the intersection of planes, lines and points.


  • ACMNA237 – Solve linear simultaneous equations, using algebraic and graphical techniques including using digital technology


  • Simultaneous Equations
  • Elimination
  • Coefficient
  • Multiplier
  • Substitution
  • Linear

About the Lesson

Ten pairs of simultaneous equations are provided in this activity, a template is provided that shows the result when equations are multiplied by the slider values and the result of subtracting the two equations. The template allows students to focus on matching coefficients by selecting the appropriate multipliers.