Charlie and Bryan have the same amount of money.
Charlie spends $10 and Bryan spends $100.
In the end, Charlie has 7 times as much money as Bryan.
- How much does each of them have at first?
- How much does Bryan have less than Charlie in the end?
|
Charlie |
Bryan |
Before |
7 u + 10 |
1 u + 100 |
Change |
- 10 |
- 100 |
After |
7 u |
1 u |
(a)
At first
Amount that Charlie has = Amount that Bryan has
7 u + 10 = 1 u + 100
7 u - 1 u = 100 - 10
6 u = 90
1 u = 90 ÷ 6 = 15
Amount that each of them has at first
= 1 u + 100
= 15 + 100
= $115
(b)
Amount that Bryan has less than Charlie in the end
= 7 u - 1 u
= 6 u
= 6 x 15
= $90
Answer(s): (a) $115; (b) $90