I was wondering what would be the voltage of the node which is connected to 1K and 4K resistors? sometimes I think I need to add up the two voltage sources( 13-2=11V) but I wonder maybe it is just 13V . can you give me some insights please? I am really carious to know when can we add up and when we cannot? what if the polarity of 2V source was the other way around? ( I think then that would 13+2=15V).
The main goal is to find V0 here is what I have tried so far. I would appreciate your comments on that.
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