**Systems of equations | Algebra 1 | Math | Khan Academy**
https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations

In this unit, we learn how to write systems of equations, solve those systems, and interpret what those solutions mean. Our mission is to provide a free, world-class education to anyone, anywhere. Khan Academy is a 501(c)(3) nonprofit organization.

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