Fiona had twice as much money as Gabby. After Fiona spent $10 and Gabby spent $10, Fiona had $25 more than Gabby. How much did Fiona have in the end?
| |
Fiona |
Gabby |
| Before |
2 u |
1 u |
| Change |
- $10 |
- $10 |
| After |
2 u - $10 |
1 u - $10 |
Comparing Fiona
and Gabby
in the end |
$25 more |
|
If Gabby was given another $25, the amounts that Fiona and Gabby each had in the end would be the same.
2 u - 10 = 1 u - 10 + 25
2 u - 1 u = 10 + 15
1 u = 25
1 u = 25 ÷ 1 = 25
Amount that Fiona had in the end
= 2 u - 10
= 2 x 25 - 10
= 50 - 10
= $40
Answer(s): $40
