In sci.math.symbolic IV <email@example.com> wrote: > Hallo, > > I'm not a mathematician. I'm a natural scientist. > > It seems that computer algebra systems like Maple (version 11) and > Mathematica (version 7) can not solve all simply solvable equation systems > automatically. Let us look e.g. at the equation system [c1=A*B/C, c2=C*A/D, > D=c3-A, C=A-B], where c1, c2 and c3 are real or complex constants, A, B, C > and D are real or complex variables, and the solutions for the variable A > are wanted. The equation system forms a cubic equation in A, and the > solutions of the equation system are the solutions of this cubic equation. > But the solve command can find neither the cubic equation nor its solutions.