Asher and Sam had an equal number of books. Asher donated
19 of her books and Sam donated
15 of his books. Sam donated 16 more books than Asher. How many books did Sam have at first?
| |
Asher |
Sam |
Before
|
9x5 =
45 u |
5x9 =
45 u |
Change
|
- 1x5 =
- 5 u |
- 1x9 =
- 9 u |
After
|
8x5 =
40 u |
4x9 =
36 u |
The number of books that Asher and Sam each had at first is the same. Make the number of books that Asher and Sam had at first the same. LCM of 9 and 5 is 45.
Number of books that Sam donated more than Asher
= 9 u - 5 u
= 4 u
4 u = 16
1 u = 16 ÷ 4 = 4
Number of books that Sam had
= 45 u
= 45 x 4
= 180
Answer(s): 180
