How to simplify a circuit with ideal current source and ideal voltage source?
The leftmost 100 ohm resistor from your schematic can be excluded form analysis - voltage across it is constant at 5V. Let assume that current in the 160 ohm resistor is I2 and current in 50+50 ohm resistor is I1. One than can write following equations :
I1 + I2 = 3A,
I2*160 - 5V - I1*100 = 0.
Hope this helps.







simulate this circuit &ndash; Schematic created using CircuitLab