Question

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.

Answer 1

i think 5(45) – h would be your answer on E2020, but im not sure

Answer 2

We let x and y be the number of copies in hardcover version and paperback version, respectively. The equations that would best represent the given scenario above are
x + y = 45
7x + 5y = 249
The values of x and y from the system of linear equations are 12 and 33, respectively. Therefore, there are 12 hardcover version and 33 paperback versions.