1. The problem statement, all variables and given/known data 2. Relevant equations Re = R1 + R2 + R3 3. The attempt at a solution I don't really understand this problem. I'm not sure how to approach it. I thought 5 = Rb + Rc, and I did that for all the rest of the resistors to solve the system but that was wrong. Can someone just help me understand what the problem is asking and what it gives?