Zoe had twice as much money as Elyse. After Zoe spent $15 and Elyse spent $5, Zoe had $30 more than Elyse. How much did Zoe have in the end?
| |
Zoe |
Elyse |
| Before |
2 u |
1 u |
| Change |
- $15 |
- $5 |
| After |
2 u - $15 |
1 u - $5 |
Comparing Zoe
and Elyse
in the end |
$30 more |
|
If Elyse was given another $30, the amounts that Zoe and Elyse each had in the end would be the same.
2 u - 15 = 1 u - 5 + 30
2 u - 1 u = 15 + 25
1 u = 40
1 u = 40 ÷ 1 = 40
Amount that Zoe had in the end
= 2 u - 15
= 2 x 40 - 15
= 80 - 15
= $65
Answer(s): $65
