Charlie and Bryan have the same amount of money.
Charlie spends $40 and Bryan spends $70.
In the end, Charlie has 7 times as much money as Bryan.
- How much does each of them have at first?
- How much does Charlie have more than Bryan in the end?
|
Charlie |
Bryan |
Before |
7 u + 40 |
1 u + 70 |
Change |
- 40 |
- 70 |
After |
7 u |
1 u |
(a)
At first
Amount that Charlie has = Amount that Bryan has
7 u + 40 = 1 u + 70
7 u - 1 u = 70 - 40
6 u = 30
1 u = 30 ÷ 6 = 5
Amount that each of them has at first
= 1 u + 70
= 5 + 70
= $75
(b)
Amount that Charlie has more than Bryan in the end
= 7 u - 1 u
= 6 u
= 6 x 5
= $30
Answer(s): (a) $75; (b) $30