E3 is confusing me. I could ''easily'' solve it if it wasnt for the voltage source E3.
the assigment is to find I1, I2 and I3 using the branch current method.
I got this so far using KVL:
E1=-R1*I1 - R3*I3
E2=-R2*I2 - R3*I3
I dont know where to put E3 at all. help me?