the library has a total collection of 2630 books. the number of non-fiction books is 240 fewer than the number of fiction books but 190 more than the number of picture books. how many books of each type are there in the library?

Answer 1

X Fiction Books.
(x-240) Non-fiction Books
(x-240)-190 Picture Books.

x + (x-240) + (x-240)-190 = 2630 Books.
x + x-240 + x-240-190 = 2630
3x -480 - 190 = 2630
3x = 2630+670 = 3300

X = 1100
(X-240) = 860
(X-240)-190 = 670

Answer 2

670

Answer 3

How do you figure this out with a bar model?