Bryan and Charlie have the same amount of money.
Bryan spends $10 and Charlie spends $30.
In the end, Bryan has 3 times as much money as Charlie.
- How much does each of them have at first?
- How much does Charlie have less than Bryan in the end?
|
Bryan |
Charlie |
Before |
3 u + 10 |
1 u + 30 |
Change |
- 10 |
- 30 |
After |
3 u |
1 u |
(a)
At first
Amount that Bryan has = Amount that Charlie has
3 u + 10 = 1 u + 30
3 u - 1 u = 30 - 10
2 u = 20
1 u = 20 ÷ 2 = 10
Amount that each of them has at first
= 1 u + 30
= 10 + 30
= $40
(b)
Amount that Charlie has less than Bryan in the end
= 3 u - 1 u
= 2 u
= 2 x 10
= $20
Answer(s): (a) $40; (b) $20