Andrew and Brad have the same amount of money.
Andrew receives $70 and Brad receives $10.
In the end, Andrew has 3 times as much money as Brad.
- How much does each of them have at first?
- How much does Brad have less than Andrew in the end?
|
Andrew |
Brad |
Before |
3 u - 70 |
1 u - 10 |
Change |
+ 70 |
+ 10 |
After |
3 u |
1 u |
(a)
At first
Amount that Andrew has = Amount that Brad has
3 u - 70 = 1 u - 10
3 u - 1 u = 70 - 10
2 u = 60
1 u = 60 ÷ 2 = 30
Amount that each of them has at first
= 1 u - 10
= 30 - 10
= $20
(b)
Amount that Brad has less than Andrew in the end
= 3 u - 1 u
= 2 u
= 2 x 30
= $60
Answer(s): (a) $20; (b) $60