Bryan and Charlie have the same amount of money.
Bryan spends $20 and Charlie spends $80.
In the end, Bryan has 3 times as much money as Charlie.
- How much does each of them have at first?
- How much does Charlie have less than Bryan in the end?
|
Bryan |
Charlie |
Before |
3 u + 20 |
1 u + 80 |
Change |
- 20 |
- 80 |
After |
3 u |
1 u |
(a)
At first
Amount that Bryan has = Amount that Charlie has
3 u + 20 = 1 u + 80
3 u - 1 u = 80 - 20
2 u = 60
1 u = 60 ÷ 2 = 30
Amount that each of them has at first
= 1 u + 80
= 30 + 80
= $110
(b)
Amount that Charlie has less than Bryan in the end
= 3 u - 1 u
= 2 u
= 2 x 30
= $60
Answer(s): (a) $110; (b) $60