Originally Posted by

**quicksilver** I have these equations I was working on that although seemed simple, turned out to be deceptively hard.

r^2/s1^4 = (x-x1)^2 + (y-y1)^2

r^2/s2^4 = (x-x2)^2 + (y-y2)^2

r^2/s3^4 = (x-x3)^2 + (y-y3)^2

I need to solve for r, x, and y in terms of s1, s2, s3, x1, x2, x3, y1, y2, y3.

I tried solving by hand and was able to get it down to just one equation with one unknown but the equation was so complicated I could not figure out how to solve it. Perhaps my approach was not correct, could anyone give me some pointers?

Thanks!