Systems of equations with graphing: exact & approximate solutions | High School Math | Khan Academy
94Sal solves a system of two linear equations in standard form, and then approximates the solution of a system whose solution isn't clearly visible.
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High School Math on Khan Academy: Did you realize that the word "algebra" comes from Arabic (just like "algorithm" and "al jazeera" and "Aladdin")? And what is so great about algebra anyway? This tutorial doesn't explore algebra so much as it introduces the history and ideas that underpin it.
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