Cole and Seth had an equal number of books. Cole donated
18 of her books and Seth donated
13 of his books. Seth donated 40 more books than Cole. How many books did Seth have at first?
| |
Cole |
Seth |
Before
|
8x3 =
24 u |
3x8 =
24 u |
Change
|
- 1x3 =
- 3 u |
- 1x8 =
- 8 u |
After
|
7x3 =
21 u |
2x8 =
16 u |
The number of books that Cole and Seth each had at first is the same. Make the number of books that Cole and Seth had at first the same. LCM of 8 and 3 is 24.
Number of books that Seth donated more than Cole
= 8 u - 3 u
= 5 u
5 u = 40
1 u = 40 ÷ 5 = 8
Number of books that Seth had
= 24 u
= 24 x 8
= 192
Answer(s): 192
