1. The problem statement, all variables and given/known data We wish to find Va-Vb given that R1 = 1000 ohm, R2 = 2000 ohm, R3 = 3000 ohm and emf = 10v. 2. Relevant equations ?? 3. The attempt at a solution I started by trying to simply the circuit but couldn't do so because of R3. then i decided to add potential differences and currents. Let the current from DA = I1 AC = I2 AB = I3 CB = I4 CD = I5 BD = I6 loop: ACDA -I2R2 - I3R1 + emf = 0 loop: ACBDA -I2R2 - I4R3 -I6R2 +emf =0 loop: ABDA -I3R1-I6R2+emf =0 current sum I1 = I2+I3 I2 = I4+I5 I6 = I4+I3 I1 = I5+I6 And i am not sure how to go from here? Do i put them in a matrix and get rref then backtrack?