Eva had
47 as much money as Marion. Eva had $48 less than Marion. Eva spent some money to buy a birthday present for her father. In the end, she had
12 as much money as Marion. How much did Eva spend on the birthday present?
| |
Eva |
Marion |
| Before |
4 u |
7 u |
| Change |
- ? |
|
| After |
1 p |
2 p |
Amount that Eva had less than Marion
= 7 u - 4 u
= 3 u
3 u = 48
1 u = 48 ÷ 3 = 16
Amount that Eva had at first
= 4 u
= 4 x 16
= $64
Amount that Marion had
= 7 u
= 7 x 16
= $112
The amount that Marion had at first and in the end remains the same.
7 u = 2 p
2 p = 112
1 p = 112 ÷ 2 = 56
Amount that Eva had in the end
= 1 p
= $56
Amount that Eva spent on the birthday present
= 64 - 56
= $8
Answer(s): $8
