I've updated my combination circuit using ohms law and have a chart below it to show what I've figured out so far, my only problem is I cannot figure out how much Current will be going through R4 and R5. Whether I use 2.5amps or 5amps it still doesn't balance everything out properly in the end. Do I have something wrong in the chart already? Is the total Voltage 250 or 350 volts? or something else? I'm stuck! Please help.

http://s373.photobucket.com/albums/oo180/dahooligans/?action=view&current=combinationcircuit-2.jpg

 

Do you understand KVL and KCL?

http://www.allaboutcircuits.com/vol_1/chpt_6/index.html will guide you in the application of KVL and KCL.