Warren and Howard had an equal number of books. Warren donated
19 of her books and Howard donated
17 of his books. Howard donated 4 more books than Warren. How many books did Howard have at first?
| |
Warren |
Howard |
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 Warren and Howard each had at first is the same. Make the number of books that Warren and Howard had at first the same. LCM of 9 and 7 is 63.
Number of books that Howard donated more than Warren
= 9 u - 7 u
= 2 u
2 u = 4
1 u = 4 ÷ 2 = 2
Number of books that Howard had
= 63 u
= 63 x 2
= 126
Answer(s): 126
