The hardcover version of a book weighs 7 ounces while its paperback version weighs 5 ounces. Forty-five copies of the book weigh a total of 249 ounces.
Weight of Books
Number Weight per book
of Books (ounces)
h
45-
5
45
7
Hard Cover
Paperback
Total
Which value could replace x in the table?
Total Weight
(ounces)
7h
х
249
40-
50-
5(45) -
5(45 - h)
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