Perry had $270 and his sister had $23 at first. After they received an equal amount of allowance, Perry had twice as much money as his sister. How much allowance did each of them receive?
| |
Perry |
His sister |
Difference |
| Before |
$270 |
$23 |
$247 |
| Change |
+ ? |
+ ? |
|
| After |
2 u |
1 u |
1 u |
The difference in the amounts between Perry and his sister at first and in the end remains unchanged after each received an equal amount of allowance.
Difference in the amounts between Perry and his sister
= 2 u - 1 u
= 1 u
1 u = 247
Allowance that each of them received
= 1 u - 23
= 247 - 23
= $224
Answer(s): $224
