Question

a puzzle expert wrote a new sudoku puzzle book. his initial costs are $864. Binding and packaging each book costs $.80. The price of the book is $2. How many copies must be sold to break even.

Answer 1

book. His initial costs are $864. Binding and packing each book cost $.80 The price of the book is $2.How many copies must be sold to break-even

y=0.8x+864
y=2x
Answer: 720 books

Answer 2

The puzzle expert must sell 720 copies to break even.

Explanation:

Hi, to solve this problem you have to write two equations analyzing the information given.

initial cost = $864

cost per book = $0.80

price of each book = $2

So, mathematically speaking:

864 + x 0.80 = y

2x = y

Substituting the 2nd equation into the first:

864 + x0.80 = 2x

864= 2x- 0.80x

864 = 1.2x

864/1.2=x

x= 720

In conclusion, the puzzle expert must sell 720 copies to break even.

Feel free to ask for more if it´s necessary or if you did not understand something.