A fruit stall had 5 times as many guavas as grapefruits. After 4 grapefruits were added, the number of guavas became thrice the number of the grapefruits. How many grapefruits were there at the fruit stall at first?
| |
Guavas |
Grapefruits |
| Before |
5x3 =
15 u |
1x3 =
3 u |
| Change |
|
+ 4 |
| After |
3x5 =
15 u |
1x5 =
5 u |
The number of guavas remains unchanged. Make the number of guavas the same. LCM of 3 and 5 is 15.
Number of grapefruits added
= 5 u - 3 u
= 2 u
2 u = 4
1 u = 4 ÷ 2 = 2
Number of grapefruits at the fruit stall at first
= 3 u
= 3 x 2
= 6
Answer(s): 6
