| Q: The room has 19 chairs. We are using 10 and then bought 9 more, how many chairs do we have in the room?
I don't know if you made this question up, but I think this question has issues (I as a reader find it meaningless). You say you bought 9 more chairs, but you don't say you put those 9 chairs into the room. Also you don't specify "we" own any of the 19 chairs in the room initially, but at the end you ask how many of those chairs "we have."
I don't know if you made this question up, but I think this question has issues (I as a reader find it meaningless). You say you bought 9 more chairs, but you don't say you put those 9 chairs into the room. Also you don't specify "we" own any of the 19 chairs in the room initially, but at the end you ask how many of those chairs "we have."