Bryan and Charlie have the same amount of money.
Bryan spends $10 and Charlie spends $100.
In the end, Bryan has 4 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 |
4 u + 10 |
1 u + 100 |
Change |
- 10 |
- 100 |
After |
4 u |
1 u |
(a)
At first
Amount that Bryan has = Amount that Charlie has
4 u + 10 = 1 u + 100
4 u - 1 u = 100 - 10
3 u = 90
1 u = 90 ÷ 3 = 30
Amount that each of them has at first
= 1 u + 100
= 30 + 100
= $130
(b)
Amount that Charlie has less than Bryan in the end
= 4 u - 1 u
= 3 u
= 3 x 30
= $90
Answer(s): (a) $130; (b) $90