Linda had
35 as much money as Cathy. Linda had $40 less than Cathy. Linda spent some money to buy a birthday present for her neighbour. In the end, she had
14 as much money as Cathy. How much did Linda spend on the birthday present?
| |
Linda |
Cathy |
| Before |
3 u |
5 u |
| Change |
- ? |
|
| After |
1 p |
4 p |
Amount that Linda had less than Cathy
= 5 u - 3 u
= 2 u
2 u = 40
1 u = 40 ÷ 2 = 20
Amount that Linda had at first
= 3 u
= 3 x 20
= $60
Amount that Cathy had
= 5 u
= 5 x 20
= $100
The amount that Cathy had at first and in the end remains the same.
5 u = 4 p
4 p = 100
1 p = 100 ÷ 4 = 25
Amount that Linda had in the end
= 1 p
= $25
Amount that Linda spent on the birthday present
= 60 - 25
= $35
Answer(s): $35
