Bryan and Adam have the same amount of money.
Bryan spends $60 and Adam spends $70.
In the end, Bryan has 3 times as much money as Adam.
- How much does each of them have at first?
- How much does Adam have less than Bryan in the end?
|
Bryan |
Adam |
Before |
3 u + 60 |
1 u + 70 |
Change |
- 60 |
- 70 |
After |
3 u |
1 u |
(a)
At first
Amount that Bryan has = Amount that Adam has
3 u + 60 = 1 u + 70
3 u - 1 u = 70 - 60
2 u = 10
1 u = 10 ÷ 2 = 5
Amount that each of them has at first
= 1 u + 70
= 5 + 70
= $75
(b)
Amount that Adam has less than Bryan in the end
= 3 u - 1 u
= 2 u
= 2 x 5
= $10
Answer(s): (a) $75; (b) $10