Ian and Brandon had an equal number of books. Ian donated
19 of her books and Brandon donated
14 of his books. Brandon donated 50 more books than Ian. How many books did Brandon have at first?
| |
Ian |
Brandon |
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 Ian and Brandon each had at first is the same. Make the number of books that Ian and Brandon had at first the same. LCM of 9 and 4 is 36.
Number of books that Brandon donated more than Ian
= 9 u - 4 u
= 5 u
5 u = 50
1 u = 50 ÷ 5 = 10
Number of books that Brandon had
= 36 u
= 36 x 10
= 360
Answer(s): 360
