Bryan and Adam have the same amount of money.
Bryan spends $10 and Adam spends $70.
In the end, Bryan has 4 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 |
4 u + 10 |
1 u + 70 |
Change |
- 10 |
- 70 |
After |
4 u |
1 u |
(a)
At first
Amount that Bryan has = Amount that Adam has
4 u + 10 = 1 u + 70
4 u - 1 u = 70 - 10
3 u = 60
1 u = 60 ÷ 3 = 20
Amount that each of them has at first
= 1 u + 70
= 20 + 70
= $90
(b)
Amount that Adam has less than Bryan in the end
= 4 u - 1 u
= 3 u
= 3 x 20
= $60
Answer(s): (a) $90; (b) $60