[D-fendr]

I probably should have added that the variables in the equation, the Xs, can represent “real world” things.

[kosta50]

I probably should have added that the variables in the equation, the Xs, can represent “real world” things

Not real "things" but real numbers i.e. 1,2,3,4, etc. and not theoretical integers, i.e. x,,y,z, etc. That doesn;t make them "real."