Charlie and Bryan have the same amount of money.
Charlie spends $40 and Bryan spends $100.
In the end, Charlie has 3 times as much money as Bryan.
- How much does each of them have at first?
- How much does Bryan have less than Charlie in the end?
|
Charlie |
Bryan |
Before |
3 u + 40 |
1 u + 100 |
Change |
- 40 |
- 100 |
After |
3 u |
1 u |
(a)
At first
Amount that Charlie has = Amount that Bryan has
3 u + 40 = 1 u + 100
3 u - 1 u = 100 - 40
2 u = 60
1 u = 60 ÷ 2 = 30
Amount that each of them has at first
= 1 u + 100
= 30 + 100
= $130
(b)
Amount that Bryan has less than Charlie in the end
= 3 u - 1 u
= 2 u
= 2 x 30
= $60
Answer(s): (a) $130; (b) $60