Question

If i were to give 7 cents to each of the beggars at my door, i would have 24 cents left

Answer 1

Add 7 to 24 to figure out how much money you started with:
7+24=31
So to summarize, you had 31 cents to start and gave 7 cents away, so now you have 24 cents

Answer 2

100-24=76/7=10.85  so there were between 10 and 11 beggars