1. The problem statement, all variables and given/known data Determine ( I L ) in the following circuit (the current "above" the 3 kΩ resistor). http://imageshack.us/a/img31/1530/circuits215.jpg [Broken] 2. Relevant equations Voltage division law V (for series resistor) = (V in) * [ (resistor)(total series resistance) ] Kirchoff's rules: I in = I out Total potential difference in a loop = 0 3. The attempt at a solution Okay, a lot of this is still new to me, so forgive me if I miss something. (The "I L" should also be "I l," as it is just a listed current ) But, there's no potential difference given so how are you able to find the current asked? Would you say voltage is equal for everything in the circuit? I try to sum all current out from left to right on the bottom as: I tot = I l + 4(I x) - 3mA but still unknowns everywhere when all I want is I l. Where should I start?