Vincent and Jeremy had an equal number of books. Vincent donated
19 of her books and Jeremy donated
17 of his books. Jeremy donated 18 more books than Vincent. How many books did Jeremy have at first?
| |
Vincent |
Jeremy |
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 Vincent and Jeremy each had at first is the same. Make the number of books that Vincent and Jeremy had at first the same. LCM of 9 and 7 is 63.
Number of books that Jeremy donated more than Vincent
= 9 u - 7 u
= 2 u
2 u = 18
1 u = 18 ÷ 2 = 9
Number of books that Jeremy had
= 63 u
= 63 x 9
= 567
Answer(s): 567
