Ivan and Valen had an equal number of books. Ivan donated
19 of her books and Valen donated
15 of his books. Valen donated 24 more books than Ivan. How many books did Valen have at first?
| |
Ivan |
Valen |
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 Ivan and Valen each had at first is the same. Make the number of books that Ivan and Valen had at first the same. LCM of 9 and 5 is 45.
Number of books that Valen donated more than Ivan
= 9 u - 5 u
= 4 u
4 u = 24
1 u = 24 ÷ 4 = 6
Number of books that Valen had
= 45 u
= 45 x 6
= 270
Answer(s): 270
