You buy books for 64 cents each, you plan to sell them for 75 cents each. You're left with 100 unsold books, and you lost $12. How many books did you sell ?

The number of books sold is 473.

Step-by-step explanation:

The difference between the original price and selling price of the book gives the profit per book.

The profit of one book = Selling price - Original price

Let,

Therefore, the equation is formed as

total Profit = 0.75y - 0.64x

⇒ 0.75y - 0.64x = -12 (1)

Total books = sold books + unsold books

x = y + 100

⇒ x-y = 100  (2)

Substitute x= 100+y in the eq(1),

0.75y - 0.64(100+y) = -12

0.75y - 64 -0.64y = -12

0.11y = -12 +64

y = 52 / 0.11

y = 472.7

y ≅ 473

The number of book sold is 473 books.

The total number of books is (100+473) = 573 books.

answer: what are the answer choices?

step-by-step explanation: