Re: System of equations
These are either olympiad problems, in which case there is a general method which I do not know yet. Solving numerically I can do.
Whomever picked these equations knew their onions I will tell you that. I went through the entire Sturmfels book and got nothing. One of the worst math books I have ever seen.
In mathematics, you don't understand things. You just get used to them.
No explanations, just DGA.
If you can not overcome with talent...overcome with effort.