Can somebody tell me what 9+10 is?

' 9 + 10 ' is a simple exercise in addition.  Its solution is  19 .

There is junk floating around the internet saying that 9+10=21.
That statement is false, and the arithmetic is wrong.
The whole thing is a joke.  If you ask someone to prove it, they will
perform a demonstration with Roman numerals, but the way they handle
the Roman numerals is itself defective, and they're hoping you won't notice.

Ez...Points (Kinda supersized nobody answered this alrdy.Welp More pts for me then)

Step-by-step explanation:

Hope this helped

-A helping friend