Operational Amplifier (Op Amp) - Simple Opamp Circuit - Negative Feedback using 20k resistors and 10k resistors and an opamp

This is the prototype of the circuit for Negative feedback where 4 volts with a 10k resistor is at the inverting input with a 20k resistor also connected to the output, and 5 volts (using 10 volts with a voltage divider) at the non-inverting input. The whole point of this circuit is to force the inputs to be equal and the output will change to make this happen.