Albert and Billy have the same amount of money.
Albert receives $50 and Billy receives $10.
In the end, Albert has 3 times as much money as Billy.
- How much does each of them have at first?
- How much does Billy have less than Albert in the end?
|
Albert |
Billy |
Before |
3 u - 50 |
1 u - 10 |
Change |
+ 50 |
+ 10 |
After |
3 u |
1 u |
(a)
At first
Amount that Albert has = Amount that Billy has
3 u - 50 = 1 u - 10
3 u - 1 u = 50 - 10
2 u = 40
1 u = 40 ÷ 2 = 20
Amount that each of them has at first
= 1 u - 10
= 20 - 10
= $10
(b)
Amount that Billy has less than Albert in the end
= 3 u - 1 u
= 2 u
= 2 x 20
= $40
Answer(s): (a) $10; (b) $40