RM> Line 1: A+B. Line 2: A+C.
 RM> Line 1 - line 2: B-C. Flipped: C-B.
 RM> Flipped added to sum: A+B + A+C + C-B = 2A+2C.
 RM> Flipped added to average (half sum):
 RM> 0.5(A+B + A+C) + C-B = A + 1.5C - 0.5B.

 BL> ... HINT: why doesn't line 2 have some B and Line 1 some C?

 RM> Is this relevant in some way? Doing that doesn't alter the
 RM> original problem at all. Or am I missing something that you
 RM> learned in your recent NDE?

  No... NDE is not necessary. It's something I learned in 40 years as
an electronics engineer, something you seem to have missed, btw... go 
straight to the problem rather than buggerise around with basic theory 
that everyone knows but no one talks about... like a pooofter cousin.

  If you think about the original problem rather than original sin and 
other irrelevenacies you'll perhaps see that your arithmetic really has 
nothing to do with what Chris has in mind.

 BL> If you can do that, you're already there.

 RM> er... I hope not...

  Cherchez la problemo, forgettez les useless crap...

Regards,
Bob
___ Blue Wave/QWK v2.12
@EOT:

---