1. The problem statement, all variables and given/known data I have this circuit diagram (see attached), and the question is: Which of the following equations is Kirchhoff's first rule as applied to the above circuit? With the answers: I1 + I2 + I3 = 0 I1 - I2 + I3 = 0 I1 + I2 - I3 = 0 I1 - I2 - I3 = 0 (it's multiple choice) The 2. Relevant equations sum of Iin = sum of I out 3. The attempt at a solution I can't even begin. I understand Kirchoff's laws pretty well, but it just appears to me that the circuit is drawn wrong. What am I doing wrong?