The total cost of 28 textbooks and workbooks is $784.
3/4 of the books are textbooks and the remaining books are workbooks. A workbook cost half as much as a textbook. Find the difference in the price of a textbook and a workbook.
Solution
Workbook ----- 1 unit
Textbook ------ 2 units
3/4 of the books are textbooks ----- 3/4 x 28 = 21
Workbooks ----- 28 – 21 = 7
21 textbooks + 7 workbooks ---- $784
(21 x 2 units) + 7 units ----- $784
42 units + 7 units ----- $784
49 units ----- $784
1 unit ------ $784 divided 49 = $16
Answer: $16
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