Xuan had twice as much money as Joelle. After Xuan spent $15 and Joelle spent $6, Xuan had $15 more than Joelle. How much did Xuan have in the end?
| |
Xuan |
Joelle |
| Before |
2 u |
1 u |
| Change |
- $15 |
- $6 |
| After |
2 u - $15 |
1 u - $6 |
Comparing Xuan
and Joelle
in the end |
$15 more |
|
If Joelle was given another $15, the amounts that Xuan and Joelle each had in the end would be the same.
2 u - 15 = 1 u - 6 + 15
2 u - 1 u = 15 + 9
1 u = 24
1 u = 24 ÷ 1 = 24
Amount that Xuan had in the end
= 2 u - 15
= 2 x 24 - 15
= 48 - 15
= $33
Answer(s): $33
