Three shelves hold 98 books. The first shelf has twice as many books as the second, and the third has 10 more books than the second. How many books are on the first shelf?
Show hints
- Remove the extra 10 books and count equal parts.
- Calculate (98 − 10) ÷ 4 × 2.
Show the answer and solution
Answer: 44
Let the second shelf be one part. The first has two parts, and the third has one part plus 10 books. Four parts equal 98 − 10 = 88, so one part is 22 and the first shelf has 44 books.