I had 5 dollars my mom gave me 10

The answer to the riddle “I had 5 dollars my mom gave me 10, while my dad gave me 30 dollars. My aunt and uncle give 100 dollars. I had another 5 dollars. How much money did I really have?” is $10.

This is an accepted answer, but not everyone agrees with it.
This is because the riddle is based on tenses and not mathematics. It’s asking “How much money did I really have?” This is past tense. It’s not asking “How much money do I currently have?”
So basically, the riddle is asking how much money you had, not about the amounts that people give or gave you, so you should only pay attention to the two parts of the riddle that say, “I had 5 dollars” and “I had another 5 dollars”.
The way the question is worded encourages you to question how much money you had before being given some by the relatives.

So to sum up: The answer to the riddle is 10 dollars.