Question

There are 143076 books in the library. The 3rd grade class walked over and each kid checked out 2 books. There are 21 students in the class. How many books are in left in the library after the students return to their classroom?

Answer 1

The answer is: There are only 143034 books left after the students return to their classroom

Explanation:

Lets call X= Number of books left in the library after the students return to their classroom.

B=Total of Books in the library

S=Total of books taken by the 3rd grade students

If each student of the 3rd grage class take 2 books, the total of book taken by the 3rd grade students would be:

S=2 books per student * Total of students of the 3rdgrade

S=2*21=42

Then we must substract Total of Books in the library minus Total of books taken by the 3rd grade students. That would be:

X=B-S

X=143076-42

X=143034

I hope that this answer will help you