Systems of equations

Linear equations graph as straight lines. The simplest of linear equations have two variables and two equations. These quotations can be soved in one of three ways, substitution, elimination, or cramer's rule. Each linear equation has what is called a determinate. They are tested by plugging in an x-y coordinate, and if it is true, then that side is shaded. I it is not, however, then the other side is shaded.