The voltage divider technique was derived from a circuit where the resistors and battery were in series. I want to focus on the the variable V in the following formula. And I only want to focus only on circuits whose elements are all in series with one another (No current division) (VRn = Rn/Req*V, where V is the sum of the the constant voltage sources in series. in the problem they used that voltage divider technique to solve for V0, however they have a multiple of V1 which is the voltage source not in series with V0. My question is regaurding circuits with only battereis and resistors: It is obvious that the voltage divider works with elements that are not in series. How will I know when I can use volt divider tech.? Because the only way I understand how to use it is if all elements are in series.