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Non linear system


Hello! 

I am employed at the resolution of a system not linear equations with 23 equations and 23 variables. 

All the equations are of the form: 

X=k*y*x+k*z*x 
Where k are constant and x and z variables. 

I use for resolution the function Nsolve, but I do not obtain solution, have to abort the evaluation after near an hour(o'clock) without obtaining results. 

What function might I use?


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