Systems of Equations. Matrix Methods. Part I

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In this video I show you how to use matrices to solve systems of linear equations. The idea is to put the system in triangular form and then, use back substitution. We do that using the three allowed row operations on the augmented matrix: 1) interchange any two rows. 2) Multiply a row by a non-zro number and 3) Replace any row by the sum of itself and a multiple of another row.