Dependent source circuit find voltage

Question

Suppose we have this circuit

^{simulate this circuit – Schematic created using CircuitLab}

How to do nodal analysis for this circuit?

Is it $$5-\frac{5-V_{A}}{2}-V_{A} = 0$$?

or $$5-\frac{5-V_{A}}{2} - 2 \frac{5-V_{A}}{2} = 0$$

EDIT

By

Answer 1

You need to introduce \$I_M\$ into the fray or you'll just get 0 = 0 and that helps nobody: -

$$5 = 2\cdot I_M + V_A$$

Where \$V_A = 2\cdot I_M\$ (as per the dependent source) so: -

$$5 = 2\cdot I_M + 2\cdot I_M$$

And, \$I_M=1.25\text{ amps}\$ and \$V_A = 2.5\text{ volts}\$. Sanity check: -