1. The problem statement, all variables and given/known data given in uploads. 2. Relevant equations 3. The attempt at a solution I just don't understand why they went [(12||6) + 2] I tried doing (12||8) and I ended up getting the wrong answer. Why do you have to add the 2k(ohms) to the effective resistance of the 12||6 k(ohms)? Why couldn't one use 12||8 ? Another question: Is there any paticular order to calculating the effective resistance? ie, does one have to work outside -> inside or something similiar? Please and thank you!