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Lars Jonsson wrote: > > Hi, > > I would like to know if the following problem is easy to solve using > Mathematica. > > I have three sets of equation f1,f2 and f3 and four unknowns x,y,z and > w. if I scan one parameter, say w, I'll get unique solutions for > x,y,z. Now I would like to plot x and y as a function of z. At the > moment I'm using my own very slow code producing horrible graphics. > > Thanks / Lars Yes, I consider this a routine problem in mathematica. Given that your equations aren't really nasty, you should be able to do this with Solve, Plot3D and some transformation rules.