PSLEA store owner had the same number of starfruits, dragonfruits and lemons at first. After 78 lemons, some starfruits and dragonfruits were sold, there were 102 fruits left. There were 2 times as many starfruits as dragonfruits left. The number of lemons left was 28 fewer than the number of starfruits left. How many dragonfruits were sold?
|
Starfruits |
Dragonfruits |
Lemons |
Total |
Before |
1 |
1 |
1 |
|
Change |
- ? |
- ? |
- 78 |
|
After |
2 u |
1 u |
2 u - 28 |
102 |
Total number of fruits in the end
= 2 u + 1 u + 2 u - 28
= 5 u - 28
5 u - 28 = 102
5 u = 102 + 28
5 u = 130
1 u = 130 ÷ 5 = 26
Number of lemons at first
= 2 u - 28 + 78
= 2 x 26 + 50
= 102
The number of lemons and dragonfruits at first is the same.
Number of dragonfruits sold
= 102 - 26
= 76
Answer(s): 76