Adam and Bryan have the same amount of money.
Adam spends $60 and Bryan spends $90.
In the end, Adam has 4 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 |
4 u + 60 |
1 u + 90 |
Change |
- 60 |
- 90 |
After |
4 u |
1 u |
(a)
At first
Amount that Adam has = Amount that Bryan has
4 u + 60 = 1 u + 90
4 u - 1 u = 90 - 60
3 u = 30
1 u = 30 ÷ 3 = 10
Amount that each of them has at first
= 1 u + 90
= 10 + 90
= $100
(b)
Amount that Bryan has less than Adam in the end
= 4 u - 1 u
= 3 u
= 3 x 10
= $30
Answer(s): (a) $100; (b) $30