This rule states that by dividing your own age by two and then adding seven you can find the socially acceptable minimum age of anyone you want to date. So if youre a 24-year-old, you can feel free to be with anyone who is at least 19 (12 + 7) but not someone who is 18.

Can a 15 year old be with a 24 year old?

The answer is NO, there is no way you can be sexually involved with this man. He commits a felony if he does so, plus any 24 year-old that wants to date a 15 year old is likely a pedophile.