Question

In a library,there were 972 fiction books. The number of fiction books was 3 times the number of non-fiction books. An equal number of fiction books and non-fiction books were given away to charity. In the end,the number of fiction books was 4 times the number of non-fiction books.How many fiction books were given away

Answer 1

number of fictions 972

non-fiction number 972/3 = 324

x= the number of books given in each category the same number of books is given

in the end there is 4times more fiction

972-x=4(324-x)

972-x=1296-4x

-x+4x=1296-972

3x=324

x= 108

the bookseller gave away 108 fiction books

verification :

972-108=864 fiction left

324-108=216 non fiction remaining

216*4=864

Explanation: