Henry and Gabriel had an equal number of books. Henry donated
19 of her books and Gabriel donated
13 of his books. Gabriel donated 8 more books than Henry. How many books did Gabriel have at first?
| |
Henry |
Gabriel |
Before
|
9x1 =
9 u |
3x3 =
9 u |
Change
|
- 1x1 =
- 1 u |
- 1x3 =
- 3 u |
After
|
8x1 =
8 u |
2x3 =
6 u |
The number of books that Henry and Gabriel each had at first is the same. Make the number of books that Henry and Gabriel had at first the same. LCM of 9 and 3 is 9.
Number of books that Gabriel donated more than Henry
= 3 u - 1 u
= 2 u
2 u = 8
1 u = 8 ÷ 2 = 4
Number of books that Gabriel had
= 9 u
= 9 x 4
= 36
Answer(s): 36
