Albert had 16 books while Kelvin had 24 books. After Kelvin gave Albert some books, the ratio of the number of books Albert had to that of Kelvin was 7:3. How many books did Kelvin give to Albert?

Kelvin gave Albert 8 books.

AAAaannndd the bot gets it wrong yet again!

(24+x)/(16-x) = 7/3
x = 4