Lee and Cody had an equal number of books. Lee donated
17 of her books and Cody donated
14 of his books. Cody donated 6 more books than Lee. How many books did Cody have at first?
| |
Lee |
Cody |
Before
|
7x4 =
28 u |
4x7 =
28 u |
Change
|
- 1x4 =
- 4 u |
- 1x7 =
- 7 u |
After
|
6x4 =
24 u |
3x7 =
21 u |
The number of books that Lee and Cody each had at first is the same. Make the number of books that Lee and Cody had at first the same. LCM of 7 and 4 is 28.
Number of books that Cody donated more than Lee
= 7 u - 4 u
= 3 u
3 u = 6
1 u = 6 ÷ 3 = 2
Number of books that Cody had
= 28 u
= 28 x 2
= 56
Answer(s): 56
