Julia spent $56 on a book. the cost of the book was $24 less than twice what she spent on a backpack. how much did the backpack cost? express your answer numerically in dollars
To find: Cost of backcover.
Solution:
Let the cost of backcover be x.
Then,
56 = 2x - 24
56+24 = 2x
80 = 2x
80 / 2 = x
x = 40
The cost of backpack is $40.
