" wrote:

How to properly analyze the problem:
http://www.electronics-tutorials.ws/...its/dcp_4.html

Look at Example 1.

Thank you Jim. I was sitting here wishing I could draw
a simple circuit into the newsgroup that models what we
are talking about and shows what really happens.
You've gone one better and found a perfect example
from an independent and credible source.

You dumbass.

Look more closely at the current flow in battery 1. It's NEGATIVE.

===================
The negative sign for I1 means that the direction of current flow
initially chosen was wrong, but never the less still valid. In fact, the
20v battery is charging the 10v battery.
==================