X=6 because you add the two like segments of AB and BC together to get 6x-8=28. So then you add the 8 to both sides and get 6x=36 and divide by 6 to get x=6.
Number of books that can fit on the shelf = Width of bookshelf/ width of average book = 72 x = 96 books
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Answer:
8
Step-by-step explanation:
(x+4)/x=24/16
24x=16x+64
8x=64
x=8