Charlie and Adam have the same amount of money.
Charlie spends $40 and Adam spends $50.
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 + 50 |
Change |
- 40 |
- 50 |
After |
3 u |
1 u |
(a)
At first
Amount that Charlie has = Amount that Adam has
3 u + 40 = 1 u + 50
3 u - 1 u = 50 - 40
2 u = 10
1 u = 10 ÷ 2 = 5
Amount that each of them has at first
= 1 u + 50
= 5 + 50
= $55
(b)
Amount that Adam has less than Charlie in the end
= 3 u - 1 u
= 2 u
= 2 x 5
= $10
Answer(s): (a) $55; (b) $10