Flynn and Sean had an equal number of books. Flynn donated
19 of her books and Sean donated
15 of his books. Sean donated 36 more books than Flynn. How many books did Sean have at first?
| |
Flynn |
Sean |
Before
|
9x5 =
45 u |
5x9 =
45 u |
Change
|
- 1x5 =
- 5 u |
- 1x9 =
- 9 u |
After
|
8x5 =
40 u |
4x9 =
36 u |
The number of books that Flynn and Sean each had at first is the same. Make the number of books that Flynn and Sean had at first the same. LCM of 9 and 5 is 45.
Number of books that Sean donated more than Flynn
= 9 u - 5 u
= 4 u
4 u = 36
1 u = 36 ÷ 4 = 9
Number of books that Sean had
= 45 u
= 45 x 9
= 405
Answer(s): 405
