N divided by 3/5=13 1/3
1 answer:
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For this case we propose a system of equations:
a: Let the variable representing the cost of hardcover books
b: Let the variable representing the cost of paperback books
According to the statement data we have:
Substituting the second equation into the first we have:
Thus, the cost of hardcover books is $12
ANswer:
The cost of hardcover books is $12
