Charlie and Adam have the same amount of money.
Charlie spends $40 and Adam spends $80.
In the end, Charlie has 5 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 |
5 u + 40 |
1 u + 80 |
Change |
- 40 |
- 80 |
After |
5 u |
1 u |
(a)
At first
Amount that Charlie has = Amount that Adam has
5 u + 40 = 1 u + 80
5 u - 1 u = 80 - 40
4 u = 40
1 u = 40 ÷ 4 = 10
Amount that each of them has at first
= 1 u + 80
= 10 + 80
= $90
(b)
Amount that Adam has less than Charlie in the end
= 5 u - 1 u
= 4 u
= 4 x 10
= $40
Answer(s): (a) $90; (b) $40