Row Reducing a Matrix - Systems of Linear Equations - Part 1. Basic notation and procedure as well as a full example are shown. The last part of the second part got cut off, but is finished in another video!!! For more free math videos, visit PatrickJMT.com
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Patrick offers a series of 58 short lectures covering everything you need to know for elementary linear algebra. His lectures are well organized, and straight to the point. You will find it to be a great review for classes and exams.