1. The problem statement, all variables and given/known data Find Voc 2. Relevant equations 3. The attempt at a solution This is what I have: (VA-9)/5 +VA/5 + 1.8 = 0 VA=0 -1.8 + VB/(60+10) +(VB-9)/20 VB=35 What I'm confused about is why you combine the 60 ohm and 10 ohm resistors for the VB nodal equation, but not the 25 ohm and 10 ohm resistor for the VA nodal equation. Is it because the grounding symbol is directly below the 25 ohm resistor? Thanks!