This system facilitates the method of solving a system of linear simultaneous equations or inverting a matrix. You select the appropriate operation, and the move through Gaussian Elimination steps. The system performs the arithmetic and displays the result after each step!
All operations are done using rational arithmetic; therefore, they are exact unless either the numerator or denominator or some intermediate step exceed the value the computer uses as an integer (generally, occurs only if values exceed several hundred million). This limit should not be a problem for reasonable sized problems staring with integer or simple rational coefficients.
If it is obvious that a wrong step has been made, then clicking on the back on the browser should take you to a previous step.
First, specify the problem parameters: