Bryan and Charlie have the same amount of money.
Bryan spends $30 and Charlie spends $100.
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 + 30 |
1 u + 100 |
Change |
- 30 |
- 100 |
After |
3 u |
1 u |
(a)
At first
Amount that Bryan has = Amount that Charlie has
3 u + 30 = 1 u + 100
3 u - 1 u = 100 - 30
2 u = 70
1 u = 70 ÷ 2 = 35
Amount that each of them has at first
= 1 u + 100
= 35 + 100
= $135
(b)
Amount that Charlie has less than Bryan in the end
= 3 u - 1 u
= 2 u
= 2 x 35
= $70
Answer(s): (a) $135; (b) $70