Gabriel and Warren had an equal number of books. Gabriel donated
19 of her books and Warren donated
17 of his books. Warren donated 12 more books than Gabriel. How many books did Warren have at first?
| |
Gabriel |
Warren |
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 Gabriel and Warren each had at first is the same. Make the number of books that Gabriel and Warren had at first the same. LCM of 9 and 7 is 63.
Number of books that Warren donated more than Gabriel
= 9 u - 7 u
= 2 u
2 u = 12
1 u = 12 ÷ 2 = 6
Number of books that Warren had
= 63 u
= 63 x 6
= 378
Answer(s): 378
