If I have several equations:
x^2 + y = 10
x^3 / y^2 = 2
x - y = 1
Obviously, the variables are more than the equations. It seems that there is no way to solve the equations.
But if I just want to know the solutions for x and y which can make the smallest errors for every equation, what can I do?
The problem seems to be a little different from curve fittings.