In mathematics, a set of simultaneous equations, also known as a system of equations or an equation system, is a finite set of equations for which common solutions are sought. An equation system is usually classified in the same manner as single equations, namely as a: System of linear equations, System of nonlinear equations, System of bilinear equations, System of polynomial equations, System of differential equations, or a System of difference equations See also Simultaneous equations model, a statistical model in the form of simultaneous linear equations Elementary algebra, for elementary methods Equations Broad-concept articles de:Gleichung#Gleichungssysteme