Peter had thrice as much money as Andy. After Peter had spent $110, Andy had twice as much money as Peter. How much more money than Andy had Peter at first?
| |
Peter |
Andy |
More |
Before
|
3x2 =
6 u |
1x2 =
2 u |
4 u |
| Change |
- $110 |
|
|
| After |
1 u |
2 u |
|
The amount that Andy had remains unchanged. Make the amount that Andy had the same. LCM of 1 and 2 is 2.
Amount that Mark had in the end = 1 u
6 u - 110 = 1 u
6 u - 1 u = 110
5 u = 110
1 u = 110 ÷ 5 = 22
Amount that Andy had more than Peter at first
= 6 u - 2 u
= 4 u
= 4 x 22
= $88
Answer(s): $88
