Xavier and Valen had an equal number of books. Xavier donated
19 of her books and Valen donated
17 of his books. Valen donated 8 more books than Xavier. How many books did Valen have at first?
| |
Xavier |
Valen |
Before
|
9x7 =
63 u |
7x9 =
63 u |
Change
|
- 1x7 =
- 7 u |
- 1x9 =
- 9 u |
After
|
8x7 =
56 u |
6x9 =
54 u |
The number of books that Xavier and Valen each had at first is the same. Make the number of books that Xavier and Valen had at first the same. LCM of 9 and 7 is 63.
Number of books that Valen donated more than Xavier
= 9 u - 7 u
= 2 u
2 u = 8
1 u = 8 ÷ 2 = 4
Number of books that Valen had
= 63 u
= 63 x 4
= 252
Answer(s): 252
