Debugging Logic Flow: Tips and Tricks

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jesuslovesu
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Never mind there, I screwed up my logic flow
 
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I haven't learned nodal analysis yet, but I don't see any thing wrong with V1 =+6V. It's just a simple circuit to me, with two sources delivering power (addictive) with net 18 V ...
so, this leaves us 18 V of battery with two resistors, and using voltage dividers:
Vacross 3000 = 3000/(3000+6000)*18 = +6

I would really appreciate if you can help me understand why this is not just a simple circuit with one battery and two loads.
 
but what was the correct answer!?