Charlie and Adam have the same amount of money.
Charlie spends $40 and Adam spends $80.
In the end, Charlie has 3 times as much money as Adam.
- How much does each of them have at first?
- How much does Adam have less than Charlie in the end?
|
Charlie |
Adam |
Before |
3 u + 40 |
1 u + 80 |
Change |
- 40 |
- 80 |
After |
3 u |
1 u |
(a)
At first
Amount that Charlie has = Amount that Adam has
3 u + 40 = 1 u + 80
3 u - 1 u = 80 - 40
2 u = 40
1 u = 40 ÷ 2 = 20
Amount that each of them has at first
= 1 u + 80
= 20 + 80
= $100
(b)
Amount that Adam has less than Charlie in the end
= 3 u - 1 u
= 2 u
= 2 x 20
= $40
Answer(s): (a) $100; (b) $40