Caden and Riordan had an equal number of books. Caden donated
19 of her books and Riordan donated
14 of his books. Riordan donated 25 more books than Caden. How many books did Riordan have at first?
| |
Caden |
Riordan |
Before
|
9x4 =
36 u |
4x9 =
36 u |
Change
|
- 1x4 =
- 4 u |
- 1x9 =
- 9 u |
After
|
8x4 =
32 u |
3x9 =
27 u |
The number of books that Caden and Riordan each had at first is the same. Make the number of books that Caden and Riordan had at first the same. LCM of 9 and 4 is 36.
Number of books that Riordan donated more than Caden
= 9 u - 4 u
= 5 u
5 u = 25
1 u = 25 ÷ 5 = 5
Number of books that Riordan had
= 36 u
= 36 x 5
= 180
Answer(s): 180
