Here I am trying to find or derive expressions for both Vo1 and Vo2 in terms of Vi1 and Vi2.
This is how I approach this. All resistors are the same. So I see that I can do KVL following I1 since there's no currents flowing into op amps.
So -Vi1 + I1xR + I1xR + Vo2 = 0 and this yields:
Vo2 = Vi1 – I1x(2R)
Because of virtual ground I concluded that Vi2 is seen mid-point between the two Rs at the output of op-amps. Consequently Vo1 = Vi2 – (I/2)xR.
Are my expressions for both Vo1 and Vo2 correct?