3 years ago

A bookstore costs $90 a day to keep open, and it spends $13 for each book-

Mathematics

1 answer:

enot [183]3 years ago

7 0

Answer:

n = 30

Step-by-step explanation:

since it cost 90 to keep open, the equation needs to equal 90

90 = ?

because it cost 13 for a book and x equals the amount of books

90 = -13x

because you make 16 for each book

90 = -13x + 16x

now you can simply

90 = 3x

x = 30

so the answer is 30

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