Help with this math puzzle?

Question

This is extra credit due tommorrow and I cant seem to figure it out.

Ok, it looks like this:

http://www.flickr.com/photos/29983918@N02/2807479460/

I know its sloopy but you get the idea. There are 9 circles and yu have to make each column going side to side and up and down equal 15. You can use 1,2,3,4,5,6,7,8,9 only once. But each side must equal 15.

Thanks alot!

Answer 1

8 , 1 , 6

3 , 5 , 7

4 , 9 , 2