SV5: Unit J Concepts 3-4: solving three-variable systems using Gauss-Jordan elimination/matrices/row-echelon form/back-substitution and solving non square systems

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Some of the most important things that the solver needs to pay attention to are the positive and negative signs! One mistake can throw off the entire problem. Also, they should make it a point to keep track of what they are doing to each row by writing it down on the line next to it. One of the last things they should make sure to pay attention to is that when back substituting, they do not mic up the value or place them in the wrong order(in the ordered triple)