1/(a+b) + 1/(b+c) + 1/(c+a)=1/10
<=>(a+b+c)(1/a+b + 1/b+c + 1/c+a)=(a+b+c).1/10
<=>2001.(1/a+b + 1/b+c + 1/c+a)=200,1
<=>2001/a+b + 2001/b+c + 2001/c+a =200,1
<=>a+b+c/a+b + a+b+c/b+c + a+b+c/c+a=200,1
<=>a+b/a+b + c/a+b + b+c/b+c + a/b+c + c+a/c+a + b/c+a
<=>3+ c/a+b + a/b+c + b/c+a=200,1
<=>c/a+b + a/b+c + b/c+a=198,1