Abstract
This chapter discusses the graphs of linear algebra. There are three elementary operations which if performed on a given system of equations, will clearly result in an equivalent system. One may change the order in which the equations are listed under one another. Any equation can be multiplied by a non-zero number. To one equation one may add a multiple of another. In practice, it is a good procedure to write down a complete set of equations with each step. It is also very useful to keep coefficients of the same unknowns in different equations lined up in vertical columns.
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