A fruit stall had 6 times as many mangosteens as lemons. After 12 lemons were added, the number of mangosteens became twice the number of the lemons. How many lemons were there at the fruit stall at first?
| |
Mangosteens |
Lemons |
| Before |
6x1 =
6 u |
1x1 =
1 u |
| Change |
|
+ 12 |
| After |
2x3 =
6 u |
1x3 =
3 u |
The number of mangosteens remains unchanged. Make the number of mangosteens the same. LCM of 2 and 6 is 6.
Number of lemons added
= 3 u - 1 u
= 2 u
2 u = 12
1 u = 12 ÷ 2 = 6
Number of lemons at the fruit stall at first
= 1 u
= 1 x 6
= 6
Answer(s): 6
