Oliver and Owen had an equal number of books. Oliver donated
18 of her books and Owen donated
13 of his books. Owen donated 20 more books than Oliver. How many books did Owen have at first?
| |
Oliver |
Owen |
Before
|
8x3 =
24 u |
3x8 =
24 u |
Change
|
- 1x3 =
- 3 u |
- 1x8 =
- 8 u |
After
|
7x3 =
21 u |
2x8 =
16 u |
The number of books that Oliver and Owen each had at first is the same. Make the number of books that Oliver and Owen had at first the same. LCM of 8 and 3 is 24.
Number of books that Owen donated more than Oliver
= 8 u - 3 u
= 5 u
5 u = 20
1 u = 20 ÷ 5 = 4
Number of books that Owen had
= 24 u
= 24 x 4
= 96
Answer(s): 96
