Jean had
25 as much money as Penelope. Jean had $36 less than Penelope. Jean spent some money to buy a birthday present for her best friend. In the end, she had
110 as much money as Penelope. How much did Jean spend on the birthday present?
|
Jean |
Penelope |
Before |
2 u |
5 u |
Change |
- ? |
|
After |
1 p |
10 p |
Amount that Jean had less than Penelope
= 5 u - 2 u
= 3 u
3 u = 36
1 u = 36 ÷ 3 = 12
Amount that Jean had at first
= 2 u
= 2 x 12
= $24
Amount that Penelope had
= 5 u
= 5 x 12
= $60
The amount that Penelope had at first and in the end remains the same.
5 u = 10 p
10 p = 60
1 p = 60 ÷ 10 = 6
Amount that Jean had in the end
= 1 p
= $6
Amount that Jean spent on the birthday present
= 24 - 6
= $18
Answer(s): $18