PSLEA store owner had the same number of guavas, lemons and grapefruits at first. After 47 grapefruits, some guavas and lemons were sold, there were 142 fruits left. There were 4 times as many guavas as lemons left. The number of grapefruits left was 20 less than the number of guavas left. How many lemons were sold?
|
Guavas |
Lemons |
Grapefruits |
Total |
Before |
1 |
1 |
1 |
|
Change |
- ? |
- ? |
- 47 |
|
After |
4 u |
1 u |
4 u - 20 |
142 |
Total number of fruits in the end
= 4 u + 1 u + 4 u - 20
= 9 u - 20
9 u - 20 = 142
9 u = 142 + 20
9 u = 162
1 u = 162 ÷ 9 = 18
Number of grapefruits at first
= 4 u - 20 + 47
= 4 x 18 + 27
= 99
The number of grapefruits and lemons at first is the same.
Number of lemons sold
= 99 - 18
= 81
Answer(s): 81