Valen and Gabriel had an equal number of books. Valen donated
17 of her books and Gabriel donated
15 of his books. Gabriel donated 16 more books than Valen. How many books did Gabriel have at first?
| |
Valen |
Gabriel |
Before
|
7x5 =
35 u |
5x7 =
35 u |
Change
|
- 1x5 =
- 5 u |
- 1x7 =
- 7 u |
After
|
6x5 =
30 u |
4x7 =
28 u |
The number of books that Valen and Gabriel each had at first is the same. Make the number of books that Valen and Gabriel had at first the same. LCM of 7 and 5 is 35.
Number of books that Gabriel donated more than Valen
= 7 u - 5 u
= 2 u
2 u = 16
1 u = 16 ÷ 2 = 8
Number of books that Gabriel had
= 35 u
= 35 x 8
= 280
Answer(s): 280
