Bryan and Adam have some money in the ratio of 7 : 3
After Bryan gives
12 of his money to Adam,
Adam has $120 more than Bryan in the end.
- How much does Adam have at first?
- How much does Bryan have in the end?
- How much does Bryan give to Adam?
|
Bryan |
Adam |
Total |
Before |
7 u |
3 u |
10 u |
Change |
- 3.5 u |
+ 3.5 u |
|
After |
3.5 u |
6.5 u |
10 u |
The total amount remains the same because there is an internal transfer from Bryan to Adam.
Amount that Bryan gives to Adam
=
12 x 7 u
= 3.5 u
Amount that Adam has more than Bryan in the end
= 6.5 u - 3.5 u
= 3 u
3 u = 120
1 u = 120 ÷ 3 = 40
(a)
Amount that Adam has at first
= 3 u
= 3 x 40
= $120
(b)
Amount that Bryan has in the end
= 3.5 u
= 3.5 x 40
= $140
(c)
Amount that Bryan gives to Adam
= 3.5 u
= 3.5 x 40
= $140
Answer(s): (a) $120; (b) $140; (c) $140