If your work is a system of equations, you work primarily with the coefficients of the terms of the equations. If you organize the terms of an equation so that their variables are in a standard order, then you arrive at the representation of systems of equations you have worked with so far in this chapter. Consider, for example, a system along the lines of the following:
3x - 4y = 1
5x + 2y = 19
You can proceed to solve the system of equations for the x and y values by using the approach given in the previous section. At the same time, you can use an approach that involves using matrices. A matrix consists of an array or collection of numbers. In a matrix, you organize the numbers in a rectangular fashion, in rows and columns. Matrices ...