Clues :
1) Amps are considered (simple models) to have voltage outputs, eg. 0 ohms.
So that allows you to compute G of each stage and then multiply the two
stage G's to get overall G.
2) Because simple amp model has infinite internal G that implies, thru analysis,
that any amp with - fdbk implies the V+ and V- input amps are at same V.
3) Amp input Z at V+ and V- is infinite for simple model.
3) So starting with first amp V + = V_In x the R divider at its input, Then write Kirchoffs laws
and solve for Vout. Hint you know the current thru the two R's to ground at V- is
same as current thru fdbk R to V-, so computing Vout easy,
V- + I x Rfdbk = Vout = V+ + I x Rfdbk.
4) Second amp is also solved same as first amp.
Regards, Dana.