The 10 resistor connected in parallel with the 9V power supply is removed to become a 9V voltage source, and then a 3-ohm resistor is connected in series, which is further simplified as a 3A current source and a 3-ohm resistor connected in parallel.
The two currents are added to get 5A.
3 euros and 6 euros get 2 euros in parallel.
Two 2 ohm resistors balance the current, so I = 5/2 a.
I. Building 10
The building 10 I mentioned may be known to all the students of Laohe University. That is a red brick building, near the west gate. When I was at school, i