hello! can you tell me please which solution is correct: We need to find the Vth and Rth. Rth is easily 4Ohms, but what about Vth??? 1st solution: Calculate Vth, by doing 10A=I1+I2 and 4V+2xI1=2xI2, where you find I1=6A and I2=4A, so Vth=12V 2nd solution: Calcullate Vth, by transforming the voltage source into current source and then apply KCL, so Vth=8V which is the correct? thanks!