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This Powerpoint lesson was created to teach Section 6.6 of the Prentice Hall California Algebra 1 textbook and/or 3.1 of the Prentice Hall California Algebra 2 textbook. It shows the students how to solve a system of equations by graphing. It includes a video which makes it perfect for days when there is a substitute in the class. (I use that time to take roll.) It can be edited to make it perfect for your specific classes.