I'm still new to EE, and taking a introduction class right now. I have a simple question regarding nodal analysis.

Suppose that we have three things connecting in parallel,

• One 12 voltage source with a resistor in series
• One resistor by itself
• One dependent voltage source where its voltage is equal to the voltage across the first resistor

These three are connected in parallel, the negative terminals are connected each other for the voltage sources.

Suppose I want to use node voltage to analyze this circuit.

What I have so far is, choose the node connecting the negative terminals as the reference node, and the node connecting the positive terminals as Node 1.

Then $$I_1+I_2+I_3 = 0$$

But how can I calculate the I_3 when there is only one voltage source there without any resistor?