Dana had thrice as much money as Fanny. After Dana spent $10 and Fanny spent $7, Dana had $25 more than Fanny. How much did Dana have in the end?
| |
Dana |
Fanny |
| Before |
3 u |
1 u |
| Change |
- $10 |
- $7 |
| After |
3 u - $10 |
1 u - $7 |
Comparing Dana
and Fanny
in the end |
$25 more |
|
If Fanny was given another $25, the amounts that Dana and Fanny each had in the end would be the same.
3 u - 10 = 1 u - 7 + 25
3 u - 1 u = 10 + 18
2 u = 28
1 u = 28 ÷ 2 = 14
Amount that Dana had in the end
= 3 u - 10
= 3 x 14 - 10
= 42 - 10
= $32
Answer(s): $32
