Jane had twice as much money as Esther. After Jane spent $10 and Esther spent $9, Jane had $18 more than Esther. How much did Jane have in the end?
| |
Jane |
Esther |
| Before |
2 u |
1 u |
| Change |
- $10 |
- $9 |
| After |
2 u - $10 |
1 u - $9 |
Comparing Jane
and Esther
in the end |
$18 more |
|
If Esther was given another $18, the amounts that Jane and Esther each had in the end would be the same.
2 u - 10 = 1 u - 9 + 18
2 u - 1 u = 10 + 9
1 u = 19
1 u = 19 ÷ 1 = 19
Amount that Jane had in the end
= 2 u - 10
= 2 x 19 - 10
= 38 - 10
= $28
Answer(s): $28
