Linear Equations Pro

LinearX is a mathematical tool which is able to solve systems of linear equations.
In version 2.0 are available:
-Systems of two variables and two equations
-Systems of three variables and two equations
-Systems of three variables and three equations
-Systems of four variables and two equations
-Systems of four variables and three equations
-Systems of four variables and four equations
-Systems of four variables and four equations
-Systems with n vairables and m equations (more than 4)