Charlie and Adam have the same amount of money.
Charlie spends $50 and Adam spends $70.
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 + 50 |
1 u + 70 |
Change |
- 50 |
- 70 |
After |
5 u |
1 u |
(a)
At first
Amount that Charlie has = Amount that Adam has
5 u + 50 = 1 u + 70
5 u - 1 u = 70 - 50
4 u = 20
1 u = 20 ÷ 4 = 5
Amount that each of them has at first
= 1 u + 70
= 5 + 70
= $75
(b)
Amount that Adam has less than Charlie in the end
= 5 u - 1 u
= 4 u
= 4 x 5
= $20
Answer(s): (a) $75; (b) $20