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This is a series of mathematics lessons that will review the important topics in algebra. It is presented in videos by the Portland Community College


Math 65 - Lesson 1a
Systems of Linear Equations in Two Variables:
An Application of a System of Linear Equation.
What is a solution to a Systems of Linear Equations in Two Variables?

Math 65 - Lesson 1b
Solving Systems of Linear Equations in Two Variables by Substitution





Math 65 - Lesson 2a
Solving Systems of Linear Equations in Two Variables by Substitution:
Examples,
When is Substitution the best method?

Math 65 - Lesson 2b
Summary of Solving Systems of Linear Equations in Two Variables:
Special Cases,
Three Common Solution Methods



 

Rotate to landscape screen format on a mobile phone or small tablet to use the Mathway widget, a free math problem solver that answers your questions with step-by-step explanations.


You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.


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