If you're seeing this message, it means we're having trouble loading external resources for Khan Academy.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

Solving systems with substitution

7 videos
1 skill
This tutorial is focused on solving systems through substitution. This is covered in several other tutorials, but this one focuses on substitution with more examples than you can shake a dog at. As always, pause the video and try to solve before Sal does.

Example 1: Solving systems by substitution

VIDEO 3:44 minutes
Solving systems by substitution 1

Example 2: Solving systems by substitution

VIDEO 4:06 minutes
Solving systems by substitution 2

Example 3: Solving systems by substitution

VIDEO 6:04 minutes
Solving systems by substitution 3

The substitution method

VIDEO 4:39 minutes
The Substitution Method

Substitution method 2

VIDEO 3:44 minutes
Substitution Method 2

Substitution method 3

VIDEO 5:58 minutes
Substitution Method 3

Practice using substitution for systems

VIDEO 4:21 minutes
Example doing Khan Academy systems of equations exercise at: http://www.khanacademy.org/math/algebra/systems-of-eq-and-ineq/e/systems_of_equations_with_substitution

Systems of equations with substitution

PRACTICE PROBLEMS
Solve systems of equations using substitution