Dana had twice as much money as Nicole. After Dana spent $11 and Nicole spent $9, Dana had $18 more than Nicole. How much did Dana have in the end?
| |
Dana |
Nicole |
| Before |
2 u |
1 u |
| Change |
- $11 |
- $9 |
| After |
2 u - $11 |
1 u - $9 |
Comparing Dana
and Nicole
in the end |
$18 more |
|
If Nicole was given another $18, the amounts that Dana and Nicole each had in the end would be the same.
2 u - 11 = 1 u - 9 + 18
2 u - 1 u = 11 + 9
1 u = 20
1 u = 20 ÷ 1 = 20
Amount that Dana had in the end
= 2 u - 11
= 2 x 20 - 11
= 40 - 11
= $29
Answer(s): $29
