Charlie and Bryan have the same amount of money.
Charlie spends $10 and Bryan spends $80.
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 + 10 |
1 u + 80 |
Change |
- 10 |
- 80 |
After |
3 u |
1 u |
(a)
At first
Amount that Charlie has = Amount that Bryan has
3 u + 10 = 1 u + 80
3 u - 1 u = 80 - 10
2 u = 70
1 u = 70 ÷ 2 = 35
Amount that each of them has at first
= 1 u + 80
= 35 + 80
= $115
(b)
Amount that Bryan has less than Charlie in the end
= 3 u - 1 u
= 2 u
= 2 x 35
= $70
Answer(s): (a) $115; (b) $70