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Solving systems with elimination

9 videos
2 skills
You can solve a system of equations with either substitution or elimination. This tutorial focuses with a ton of examples on elimination. You'll learn best if you pause the videos and try to do the problem before Sal does. Once you get a hang for things, feel free to skip forward to the exercises. Common Core Standards: 8.EE.C.8, 8.EE.C.8b

Example 1: Solving systems by elimination

VIDEO 5:51 minutes
Solving systems by elimination

Example 2: Solving systems by elimination

VIDEO 3:45 minutes
Solving systems by elimination 2

Addition elimination method 1

VIDEO 3:38 minutes
Addition Elimination Method 1

Addition elimination method 2

VIDEO 4:26 minutes
Addition Elimination Method 2

Addition elimination method 3

VIDEO 5:05 minutes
Addition Elimination Method 3

Addition elimination method 4

VIDEO 2:38 minutes
Addition Elimination Method 4

Example 3: Solving systems by elimination

VIDEO 4:57 minutes
Solving systems by elimination 3

Simple elimination practice

VIDEO 4:18 minutes
Practice solving systems of equations through simple elimination (exercise at http://www.khanacademy.org/math/algebra/systems-of-eq-and-ineq/e/systems_of_equations_with_elimination_0.5 )

Systems of equations with simple elimination

PRACTICE PROBLEMS
Solve systems of equation with one-step elimination (e.g., x-values or y-values cancel each other out).

Systems with elimination practice

VIDEO 5:31 minutes
Example of solving systems of equations with elimination

Systems of equations with elimination

PRACTICE PROBLEMS
Solving systems of equations with elimination.