Hello

A few days of less than 50g of carbs will enable a 10lb drop however this will be mostly water, there for being a fairly un-healthy thing to do...

not sure if its "weight" or "fat" you need to lose here...

to lose around 10 lbs of "fat" will require about 35,000 calories be burnt in excess of what you consume.

find our your "base metabolic rate" www.google.com will help

then use this site to track your intake of calories ensuring a deficit of no more than around 25% of your base metabolic rate

and to help use some carido type work outs.

hope this helps, its fairly general and without knowing excatly what you need to do its about as much as i know might help you.

good luck!