Question: Please, take a loot at this circuit:

![enter image description here](https://i.stack.imgur.com/OhOEC.png)

Obviously, this is a circuit that is very easy to solve using lots of different methods. However, I'm trying to solve it using Nodal Analysis (I'm not sure if it's possible).

I tried to use node B as reference. When I do it, I notice that the voltage from C to B is known (10V). The voltage from A to B is already known (20i). So, there's no equation to find.

I would like to know if this circuit is already "solved" (voltages are known) or if I'm missing something here. I just can't find any useful equation taking B as the reference. Even if I try to find a equation using node A, I can't go forward since I can't find find the current that is passing through the dependent source.

Thanks!

Answer: 
At Node C: (C+20i)/10 + (C+20i)/30 = i

But C=10, hence you can solve for i.

Then, voltage at A is -20i
You won't be able to set up a traditional Nodal equation for node A because of the dependent voltage source. This brings you down one equation, but in return you get the equation for the dependent voltage source: **Va = -20\*i** ('i' which would also be referenced in your nodal equaton for node C).

So to answer to "can you solve this using nodal analysis" well... I would say yes, but that's assuming that dependent voltage source stuff is somewhat orthogonal.