Here are a few other sites with examples that may help you (ignore those that are obviously substantially different than what we have studied so far (for example, the ones with capacitors):

http://my.safaribooksonline.com/book/electrical-engineering/semiconductor-technology/9788177589788/operational-amplifier/solved_problems-014 Links to an external site.

http://tuttle.merc.iastate.edu/ee201/practice/op_amps/op_amps.php Links to an external site.

http://people.clarkson.edu/~jsvoboda/eta/dcWorkout/OAckt.pdf Links to an external site.

http://www.ecircuitcenter.com/Circuits.htm Links to an external site.

Also check out this Op Amp concept map http://hyperphysics.phy-astr.gsu.edu/hbase/electronic/opampcon.html#c1 Links to an external site.