$12 for 3 paperback books;$28 for 7 paperback book
2 answers:
So assuming to solve for rate
12 for 3
divide
12/3=4
$4 per 1 book
28 for 7
divide
28/7=4
$4 per book
the rate is $4 per paperback book
12/3=4
28/7=4
So 4$ for a paperback book.
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