well considering thats not all you have to do to lose weight just cutting back on those two things you will probably lose about 5-10 lbs in all but considering how much you use to drink maybe 10-15lbs.
Yes, remove the pasta as much as you can. But activity is very important. Since you are 15, it should be easy to take a run around your neighborhood every day. That, combined with removing soda and pasta, would help you lose. I wish I could still do that. I remember thinking I was fat with similar height and weight as you. It will never get easier. You are at a great age to sculpt your figure!
