i do not quite understand. I have three resistors R1, R2 And R3 of resistances 16 ohms, 8 ohms and 2 ohms, the voltage across R2 is 2V and i have to calculate the supply voltage and current, but i have treid many ways of doing it and cant, lol, can you possibly enlighten me n this a bit more, thank yuo very much for your help