Gwen had
35 as much money as Linda. Gwen had $40 less than Linda. Gwen spent some money to buy a birthday present for her uncle. In the end, she had
110 as much money as Linda. How much did Gwen spend on the birthday present?
| |
Gwen |
Linda |
| Before |
3 u |
5 u |
| Change |
- ? |
|
| After |
1 p |
10 p |
Amount that Gwen had less than Linda
= 5 u - 3 u
= 2 u
2 u = 40
1 u = 40 ÷ 2 = 20
Amount that Gwen had at first
= 3 u
= 3 x 20
= $60
Amount that Linda had
= 5 u
= 5 x 20
= $100
The amount that Linda had at first and in the end remains the same.
5 u = 10 p
10 p = 100
1 p = 100 ÷ 10 = 10
Amount that Gwen had in the end
= 1 p
= $10
Amount that Gwen spent on the birthday present
= 60 - 10
= $50
Answer(s): $50
