Resolved Question: 15 year old trying to lose 10 pounds before September? help?

Im m15 years old and im trying to lose 10 pounds for me before i start school in september. I've tried by asking these questions and exercising for the past two summers but no luck.
what is the best plan for me to do this (exercise and eating wise)

I also use Wu-Long Fat Burning/Chinese Slimming Tea.
Im not going to buy anything online because i already bought the WuLong tea online. Just need plans