Marion had twice as much money as Yen. After Marion spent $11 and Yen spent $10, Marion had $19 more than Yen. How much did Marion have in the end?
| |
Marion |
Yen |
| Before |
2 u |
1 u |
| Change |
- $11 |
- $10 |
| After |
2 u - $11 |
1 u - $10 |
Comparing Marion
and Yen
in the end |
$19 more |
|
If Yen was given another $19, the amounts that Marion and Yen each had in the end would be the same.
2 u - 11 = 1 u - 10 + 19
2 u - 1 u = 11 + 9
1 u = 20
1 u = 20 ÷ 1 = 20
Amount that Marion had in the end
= 2 u - 11
= 2 x 20 - 11
= 40 - 11
= $29
Answer(s): $29
