Werner Exinger wrote:
Thats interesting. So when Mupad is forced to solve symbolically first an then insert the values because the solve expression is assigned a function we get three results, when the values are put in first we just get one.!?
I also tried how good the solutions are - rather poor!
I am struggling to reply to the correct post now 
However, here will do. I think I have got my head around the cause of receiving different symbolic results, but the question is, why? I don't see any logical reason we Mupad returns 3 results because the numeric assignment is passed to a function.