Elyse had
37 as much money as Wendy. Elyse had $36 less than Wendy. Elyse spent some money to buy a birthday present for her best friend. In the end, she had
19 as much money as Wendy. How much did Elyse spend on the birthday present?
| |
Elyse |
Wendy |
| Before |
3 u |
7 u |
| Change |
- ? |
|
| After |
1 p |
9 p |
Amount that Elyse had less than Wendy
= 7 u - 3 u
= 4 u
4 u = 36
1 u = 36 ÷ 4 = 9
Amount that Elyse had at first
= 3 u
= 3 x 9
= $27
Amount that Wendy had
= 7 u
= 7 x 9
= $63
The amount that Wendy had at first and in the end remains the same.
7 u = 9 p
9 p = 63
1 p = 63 ÷ 9 = 7
Amount that Elyse had in the end
= 1 p
= $7
Amount that Elyse spent on the birthday present
= 27 - 7
= $20
Answer(s): $20
