David and Julian had a total of $165. David gave $19 to Julian. In return, Julian gave $39 to David. In the end, David had $13 more than Julian. How much money did David have at first?
| |
David |
Julian |
Total |
| Before |
? |
|
$165 |
| Change 1 |
- $19 |
+ $19 |
|
| Change 2 |
+ $39 |
- $39 |
|
| After |
1 u + $13 |
1 u |
$165 |
Total amount that David and Julian had
= 1 u + 1 u + $13
= 2 u + 13
2 u + 13 = 165
2 u = 165 - 13
2 u = 152
1 u = 152 ÷ 2 = 76
Amount that David had in the end
= 1 u + 13
= 76 + 13
= $89
Amount that David had at first
= 89 - 39 + 19
= $69
Answer(s): $69
