1. The problem statement, all variables and given/known data Using Kirchhoff's rules, calculate the current in R1 with the directions indicated in the figure below. http://img11.imageshack.us/img11/6018/sbpic2822.png [Broken] Assume that R1 = 2.00 kΩ, R2 = 3.00 kΩ, R3 = 4.00 kΩ, E1 = 75.0 V, E2 = 70.0 V and E3 = 85.0 V. 2. Relevant equations Kirchhoff's Rules of voltage loops. 3. The attempt at a solution The problem I'm having is establishing what the voltage loops are here. My book doesn't really explain what to do in the case of multiple batteries and branches... Here's what I have so far: I2 = I3 + I1 at the junction points. Left Loop: E2 - E1 - I1R1 - I2R2 = 0 Right Loop: E2 - E3 - I3R3 - I2R2 = 0 I assumed that since the current goes in the opposite direction on the other side, I change it from counter clockwise on the left to clockwise on the right. Can anyone please tell me how to properly do this problem? It would be much appreciated. Thanks!