Abstract: A teaching assisting  system by solving linear equations is studied by using the computer’s characteristics of fast calculation and large storage.First,the algorithms of the main methods of solving linear equations are designed,and each algorithm is programmed in the language C++ and debugged,and the program base is formed.Then the system which can demonstrate the live numerical experiments is established by using the widget of MFC offered by VC++.

Key words: linear equations, widgets of MFC, simulation experiments