Can I lose 15 lbs. by Sept. 1 this way? Please help!?

Definatly i you work out 5/6 days a week and eat well , make sure you do eat some carba maybe with dinner ( healthy ones - qinou, wholemeal pasta, sweet potatoes etc) then you will probs lose around 3lbs a week, which over two months is 24lbs so u can have some slack days, dont strve yourself as otherwise weighloss will stop you need to eat regualry to keep up your metabolism, and make sure you have a rest day off exercise to let our body recover.