Solving Systems of Equations by Substitution
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Objective
I can solve a system of equations using substitution.
Part 1 of 4
Warm-up video
Khan Academy · 9:21Vetted channel
We don't generate video — this one is by Khan Academy on YouTube. The practice questions and exit ticket below were drafted by AI for this objective, and every question is editable in the teacher guide.
Part 2 of 4
Key concepts
3 concepts
- 1
The substitution method involves solving for one variable in one equation and substituting that expression into the other equation.
- 2
When using substitution, the goal is to create a single equation with one unknown variable that can be solved.
- 3
After finding the value of one variable, substitute it back into either of the original equations to solve for the remaining variable.
Part 3 of 4
Practice
8 questions
What is the primary goal when solving a system of equations?
In the substitution method, what is the first step you should take?
Part 4 of 4
Exit ticket
Quick comprehension check
“Solve the following system of equations using substitution: y = 2x + 1, 3x + 2y = 16. Show all steps.”
Sample answer included in the free materials
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