1. The problem statement, all variables and given/known data Find V1. I attached a picture for the circuit. 2. Relevant equations 3. The attempt at a solution This is what I did (Refer to Fig. 1): -2A + (V1)/(50) +(V1-45)/(1) = 0 But when I looked at the solution my professor posted this is what he did (Redrew Fig.1 as Fig.2): -2A + (V1)/(50) +(V1-45)/(1+4) = 0 I thought you were finding the potential difference between V1 and the voltage source? I don't understand why he included the 4Ω resistor. Any help is appreciated!