Reflection: Developing a Conceptual Understanding Solving Linear Systems of Equations with Substitution (Day 1 of 3) - Section 3: Guided Notes + Practice


The order of the examples in the guided notes is very important as it builds from substituting a value into an equations to substituting an expression into an equation. I’ve found that students need to see substitution in its simplest form before they are able to effectively conceptualize substituting polynomials. In examples 2 and 3 it is important to point out that students should choose which variable to substitute for based on which variable is isolated. In example 4, point out that since y is isolated in both equations, you are essentially just setting whatever y equals in one equation equal to whatever y equals in the other equation.  Note that you would do the same whether y is on the left side or the right side, these examples just happen to all have y on the left side.

  Guided Notes
  Developing a Conceptual Understanding: Guided Notes
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Solving Linear Systems of Equations with Substitution (Day 1 of 3)

Unit 6: Systems of Linear Equations
Lesson 3 of 9

Objective: Students will solve linear systems of equations using substitution.

Big Idea: Students will understand the idea of substitution with symbolic and written comparisons.

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