Emily had twice as much money as Tammy. After Emily spent $13 and Tammy spent $7, Emily had $21 more than Tammy. How much did Emily have in the end?
| |
Emily |
Tammy |
| Before |
2 u |
1 u |
| Change |
- $13 |
- $7 |
| After |
2 u - $13 |
1 u - $7 |
Comparing Emily
and Tammy
in the end |
$21 more |
|
If Tammy was given another $21, the amounts that Emily and Tammy each had in the end would be the same.
2 u - 13 = 1 u - 7 + 21
2 u - 1 u = 13 + 14
1 u = 27
1 u = 27 ÷ 1 = 27
Amount that Emily had in the end
= 2 u - 13
= 2 x 27 - 13
= 54 - 13
= $41
Answer(s): $41
