1. The problem statement, all variables and given/known data Find the potential difference between points a and b. Picture of Circuit involved. 2. Relevant equations V=IR ΔV=Vb-Va 3. The attempt at a solution Pretty much completely lost, due to the only one current shown I'm not sure which way the current flows through the rest of the circuit so I do not know how to go about the loop rule. It started off kinda like -I1(30Ω)=2.118 V But I know that cannot be correct cause if you left from the 24V battery and went down you'd have something about 23.3V across there, like I said, completely lost, any help would be great.