A fruit stall had 3 times as many passion fruits as grapefruits. After 4 passion fruits were added, the number of passion fruits became 30 more than the number of grapefruits. How many grapefruits were there at the fruit stall at first?
| |
Passion Fruits |
Grapefruits |
| Before |
3 u |
1 u |
| Change |
+ 4 |
|
| After |
3 u + 4 |
1 u |
If another 4 grapefruits are added, the number of passion fruits and grapefruits will be the same.
3 u + 4 = 1 u + 30
3 u - 1 u = 30 - 4
2 u = 26
1 u = 26 ÷ 2 = 13
Number of grapefruits at the fruit stall at first
= 1 u
= 13
Answer(s): 13
