David had $188 and his cousin had $34 at first. After they received an equal amount of allowance, David had thrice as much money as his cousin. How much allowance did each of them receive?
| |
David |
His cousin |
Difference |
| Before |
$188 |
$34 |
$154 |
| Change |
+ ? |
+ ? |
|
| After |
3 u |
1 u |
2 u |
The difference in the amounts between David and his cousin at first and in the end remains unchanged after each received an equal amount of allowance.
Difference in the amounts between Perry and his cousin
= 3 u - 1 u
= 2 u
2 u = 188 - 34
2 u = 154
1 u = 154 ÷ 2 = 77
Allowance that each of them received
= 1 u - 34
= 77 - 34
= $43
Answer(s): $43
