Owen and Jeremy had an equal number of books. Owen donated
19 of her books and Jeremy donated
13 of his books. Jeremy donated 18 more books than Owen. How many books did Jeremy have at first?
| |
Owen |
Jeremy |
Before
|
9x1 =
9 u |
3x3 =
9 u |
Change
|
- 1x1 =
- 1 u |
- 1x3 =
- 3 u |
After
|
8x1 =
8 u |
2x3 =
6 u |
The number of books that Owen and Jeremy each had at first is the same. Make the number of books that Owen and Jeremy had at first the same. LCM of 9 and 3 is 9.
Number of books that Jeremy donated more than Owen
= 3 u - 1 u
= 2 u
2 u = 18
1 u = 18 ÷ 2 = 9
Number of books that Jeremy had
= 9 u
= 9 x 9
= 81
Answer(s): 81
