Adam and Bryan have the same amount of money.
Adam spends $80 and Bryan spends $90.
In the end, Adam has 3 times as much money as Bryan.
- How much does each of them have at first?
- How much does Adam have more than Bryan in the end?
|
Adam |
Bryan |
Before |
3 u + 80 |
1 u + 90 |
Change |
- 80 |
- 90 |
After |
3 u |
1 u |
(a)
At first
Amount that Adam has = Amount that Bryan has
3 u + 80 = 1 u + 90
3 u - 1 u = 90 - 80
2 u = 10
1 u = 10 ÷ 2 = 5
Amount that each of them has at first
= 1 u + 90
= 5 + 90
= $95
(b)
Amount that Adam has more than Bryan in the end
= 3 u - 1 u
= 2 u
= 2 x 5
= $10
Answer(s): (a) $95; (b) $10