Adam and Bryan have the same amount of money.
Adam spends $20 and Bryan spends $40.
In the end, Adam has 3 times as much money as Bryan.
- How much does each of them have at first?
- How much does Bryan have less than Adam in the end?
|
Adam |
Bryan |
Before |
3 u + 20 |
1 u + 40 |
Change |
- 20 |
- 40 |
After |
3 u |
1 u |
(a)
At first
Amount that Adam has = Amount that Bryan has
3 u + 20 = 1 u + 40
3 u - 1 u = 40 - 20
2 u = 20
1 u = 20 ÷ 2 = 10
Amount that each of them has at first
= 1 u + 40
= 10 + 40
= $50
(b)
Amount that Bryan has less than Adam in the end
= 3 u - 1 u
= 2 u
= 2 x 10
= $20
Answer(s): (a) $50; (b) $20