**This applet simulates solving
the system of linear equations **

Your objective is to find the values of x, y, and z which solve
these three equations simultaneously. There are two things you can do
which will not change the solution. First, you can multiply an equation
by a nonzero integer. Second, you can add an equation to another
equation.

To add an equation to another equation, click on the first equation
and you'll see a red copy of it appear. Drag this red copy to the target--
taking care not to hit the uninvolved equation--and their sum will
replace the target equation.

To multiply a row by a number N, type in the number and it will
appear in the "multiplier" field. Click on the multiplier and drag it
over to the target equation and the product will replace the original
equation.