Charlie and Bryan have the same amount of money.
Charlie spends $20 and Bryan spends $80.
In the end, Charlie has 4 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 |
4 u + 20 |
1 u + 80 |
Change |
- 20 |
- 80 |
After |
4 u |
1 u |
(a)
At first
Amount that Charlie has = Amount that Bryan has
4 u + 20 = 1 u + 80
4 u - 1 u = 80 - 20
3 u = 60
1 u = 60 ÷ 3 = 20
Amount that each of them has at first
= 1 u + 80
= 20 + 80
= $100
(b)
Amount that Bryan has less than Charlie in the end
= 4 u - 1 u
= 3 u
= 3 x 20
= $60
Answer(s): (a) $100; (b) $60