Question 3
A bookstore had a box of books. One half and 2 more books were sold on the first day. On the second day, 3 fewer books than two thirds of the remaining stock were sold. Finally, 9 books were left. How many books were there originally?
Source glossary (English–Vietnamese): One half: một nửa; 2 more books: nhiều hơn 2 quyển sách; Two third: hai phần ba; Remaining: phần còn lại; 3 less books: ít hơn 3 quyển sách; Left: còn lại; Originally: ban đầu.
Source glossary (English–Vietnamese): One half: một nửa; 2 more books: nhiều hơn 2 quyển sách; Two third: hai phần ba; Remaining: phần còn lại; 3 less books: ít hơn 3 quyển sách; Left: còn lại; Originally: ban đầu.