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## Discussion

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### Solving Systems of Equations Algebraically

You can solve a system of equations by substitution or by elimination.

Sometimes each equation must be multiplied before elimination can be used.

If you obtain an equation that is always true, the system has an infinite number of solutions.

If you obtain an equation that is never true, the system has no solution.

### Solving Systems of Equations Algebraically

Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.

- Intro 0:00
- Solving by Substitution 0:15
- Examples
- Solving by Elimination 4:19
- Examples
- Solving by Multiplication 7:24
- Examples
- Inconsistent and Dependent Systems 11:42
- Example: Spotting Differences
- Lecture Example 1 15:00
- Lecture Example 2 17:35
- Additional Example 3
- Additional Example 4

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