Adam and Charlie have the same amount of money.
Adam spends $10 and Charlie spends $20.
In the end, Adam has 6 times as much money as Charlie.
- How much does each of them have at first?
- How much does Charlie have less than Adam in the end?
|
Adam |
Charlie |
Before |
6 u + 10 |
1 u + 20 |
Change |
- 10 |
- 20 |
After |
6 u |
1 u |
(a)
At first
Amount that Adam has = Amount that Charlie has
6 u + 10 = 1 u + 20
6 u - 1 u = 20 - 10
5 u = 10
1 u = 10 ÷ 5 = 2
Amount that each of them has at first
= 1 u + 20
= 2 + 20
= $22
(b)
Amount that Charlie has less than Adam in the end
= 6 u - 1 u
= 5 u
= 5 x 2
= $10
Answer(s): (a) $22; (b) $10