rjenkinsgb Could you briefly explain the way you would have it written in formulas to calculate output voltage?Just for information, another way of solving it - the way I did it in my head - is based on the fact that the gain of a simple inverting opamp circuit such as this is the ratio of input to feedback resistors.
You don't have to go through all the current calculations, if it's not classwork!
2k2 + 22k input to 22k feedback; 11:10
The input voltage is +7V, relative to the fixed positive input at +5V.
The output voltage will be +5V - (10/11 of 7V)
The approximation I used for for 10/11 is 7 - 0.7 + 0.07 = 6.37V
5 - 6.37 = -1.37
Calculated exact answer for 10/11 of 7V = 6.364 to three digits, so pretty close.