Another Computational Model of Solving a Linear System

The process of elimination really works! Use elimination when substitution isn't doing the job. The 29th segment in a series of 33 introduces the elimination method to solving linear systems. Pupils work several exercises to grasp the nuance in finding the correct combinations that eliminate the variable. 

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CCSS: Designed
Additional Tags

Instructional Ideas

  • Lead a discussion on how to determine which variable to eliminate
  • Use graphing software to verify solutions
Classroom Considerations

  • Requires graph paper
Pros

  • Highlights the section where the CCSS Mathematical Practices is used within the lesson plan
  • Answer key shows the steps used to calculate the solution
Cons

  • None
Common Core