1. The problem statement, all variables and given/known data http://imgur.com/Kq5e4Ka This is the circuit I need to find the Req for, the only things given are the Voltage of 7.1, and the resistance of each circuit. 2. Relevant equations V=IR Kirchhoffs laws, the KVL and KCL. 3. The attempt at a solution I have spent some time trying to solve this circuit, however I now realize that using circuits in parallel and in series is not an option due to the 2.3 ohm resistor, my instructor told me to use the KVL and KCL equations to solve, but I am unfamiliar with these as we haven't gone over them in class. From what I have tried to do so far, I want to identify all of the loops ( which I didnt do in the picture to leave it easy to view), and all of the junctions to start the equations. I named resistors according to their Ohms. There is a loop from the 11R, 2.1R, and 6.0R resistor, 11R,7.9R, and 7.7R 11R, 2.1R, 2.3R, and 7.7R 11R,7.9R,2.3R, 6R There are junctions for R11=R2.1+R7.9 R2.1=R2.3+R6.0 R7.9=R2.3+R7.7 And you can say R6.0+R7.7=R11 I believe This is where I hit a wall... mathematically I am unsure where to proceed, I know that I have several unknowns and several equations, therefore meaning I need to solve by combination of equations, but when I try to do this I get mixed up with combining the equations and end up with many values I cannot solve for. My goal is to find the current coming from the first circuit, and I believe from there for solution will become much easier. Some people have mentioned using matrices but this is something completely unknown to me, so I believe algebra is the only option. Am I on the right path to solving this problem, so far?