Bryan and Charlie have the same amount of money.
Bryan spends $40 and Charlie spends $60.
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 + 40 |
1 u + 60 |
Change |
- 40 |
- 60 |
After |
3 u |
1 u |
(a)
At first
Amount that Bryan has = Amount that Charlie has
3 u + 40 = 1 u + 60
3 u - 1 u = 60 - 40
2 u = 20
1 u = 20 ÷ 2 = 10
Amount that each of them has at first
= 1 u + 60
= 10 + 60
= $70
(b)
Amount that Charlie has less than Bryan in the end
= 3 u - 1 u
= 2 u
= 2 x 10
= $20
Answer(s): (a) $70; (b) $20