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

Systems of equations word problems example: Weight of TV and DVD

VIDEO 5:51 minutes
Sal solves a word problem about the weights of TVs and DVDs by creating a system of equations and solving it.

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

How to solve a system of linear equations with elimination (basic example)

VIDEO 4:18 minutes
Sal solves the following system of equations by eliminating x: x-4y=-18 and -x+3y=11.

Solve systems of linear equations with elimination (basic)

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

Solve systems of linear equations with elimination (advanced)

PRACTICE PROBLEMS
Solve systems of equation with multi-step elimination (e.g., a manipulation is need in order for x-values or y-values to cancel each other out).