Emily had
35 as much money as Anna. Emily had $42 less than Anna. Emily spent some money to buy a birthday present for her cousin. In the end, she had
13 as much money as Anna. How much did Emily spend on the birthday present?
| |
Emily |
Anna |
| Before |
3 u |
5 u |
| Change |
- ? |
|
| After |
1 p |
3 p |
Amount that Emily had less than Anna
= 5 u - 3 u
= 2 u
2 u = 42
1 u = 42 ÷ 2 = 21
Amount that Emily had at first
= 3 u
= 3 x 21
= $63
Amount that Anna had
= 5 u
= 5 x 21
= $105
The amount that Anna had at first and in the end remains the same.
5 u = 3 p
3 p = 105
1 p = 105 ÷ 3 = 35
Amount that Emily had in the end
= 1 p
= $35
Amount that Emily spent on the birthday present
= 63 - 35
= $28
Answer(s): $28
