Pamela had
35 as much money as Gillian. Pamela had $36 less than Gillian. Pamela spent some money to buy a birthday present for her father. In the end, she had
19 as much money as Gillian. How much did Pamela spend on the birthday present?
| |
Pamela |
Gillian |
| Before |
3 u |
5 u |
| Change |
- ? |
|
| After |
1 p |
9 p |
Amount that Pamela had less than Gillian
= 5 u - 3 u
= 2 u
2 u = 36
1 u = 36 ÷ 2 = 18
Amount that Pamela had at first
= 3 u
= 3 x 18
= $54
Amount that Gillian had
= 5 u
= 5 x 18
= $90
The amount that Gillian had at first and in the end remains the same.
5 u = 9 p
9 p = 90
1 p = 90 ÷ 9 = 10
Amount that Pamela had in the end
= 1 p
= $10
Amount that Pamela spent on the birthday present
= 54 - 10
= $44
Answer(s): $44
