1. The problem statement, all variables and given/known data Determine the voltage across all elements 2. Relevant equations i=v/r v1+v2+v3+..=0 3. The attempt at a solution I'm not sure which of the nodes I should use to take my KVL from. The a and b are labeled, but should I combine the set of 2-6-6 resistors and label that as an essential node? Should I have four essential nodes?