Question #28f05

1 Answer
Kushagra
Dec 18, 2017

Assuming that each book's cost is the same:
In the starting, he had #$133#, after paying for #8# books, he was left with #$13#, so #8# books total cost was #$133-$13=$120#
#8" books"=$120#
Divide both sides by 8
#cancel8/cancel8 "books"=$(cancel120^15)/cancel8#
You get
#1 " book"=$15#

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