Xandra had
37 as much money as Roshel. Xandra had $40 less than Roshel. Xandra spent some money to buy a birthday present for her nephew. In the end, she had
15 as much money as Roshel. How much did Xandra spend on the birthday present?
|
Xandra |
Roshel |
Before |
3 u |
7 u |
Change |
- ? |
|
After |
1 p |
5 p |
Amount that Xandra had less than Roshel
= 7 u - 3 u
= 4 u
4 u = 40
1 u = 40 ÷ 4 = 10
Amount that Xandra had at first
= 3 u
= 3 x 10
= $30
Amount that Roshel had
= 7 u
= 7 x 10
= $70
The amount that Roshel had at first and in the end remains the same.
7 u = 5 p
5 p = 70
1 p = 70 ÷ 5 = 14
Amount that Xandra had in the end
= 1 p
= $14
Amount that Xandra spent on the birthday present
= 30 - 14
= $16
Answer(s): $16