Answer:
Explanation:
1.) Number of math and english books in 2013 and 2014
2.) 2013 books = 60 +80 = 140
2015 books = 80 +100 = 180
3.) 2013 + 2014 books
= 80 + 100 = 180
4.) Math books =180 and english books = 140
sp 180 -140 = 40
5.) In 2013, math books = 80 books and for 2014 = 100 books
6.)
2013, math + english books.
60 + 80 =140
in 2014 = 80 +100
= 180