Jenson and Vaidev had an equal number of books. Jenson donated
17 of her books and Vaidev donated
14 of his books. Vaidev donated 9 more books than Jenson. How many books did Vaidev have at first?
| |
Jenson |
Vaidev |
Before
|
7x4 =
28 u |
4x7 =
28 u |
Change
|
- 1x4 =
- 4 u |
- 1x7 =
- 7 u |
After
|
6x4 =
24 u |
3x7 =
21 u |
The number of books that Jenson and Vaidev each had at first is the same. Make the number of books that Jenson and Vaidev had at first the same. LCM of 7 and 4 is 28.
Number of books that Vaidev donated more than Jenson
= 7 u - 4 u
= 3 u
3 u = 9
1 u = 9 ÷ 3 = 3
Number of books that Vaidev had
= 28 u
= 28 x 3
= 84
Answer(s): 84
