At a mart, there were
13 as many mangosteens as dragonfruits. After 3 mangosteens and 15 dragonfruits were sold, the number of mangosteens became the same as the number of dragonfruits. How many fruits were at the mart in the end?
| |
Mangosteens |
Dragonfruits |
| Before |
1 u |
3 u |
| Change |
- 3 |
- 15 |
| After |
1 u - 3 |
3 u - 15 |
Number of mangosteens and dragonfruits in the end is the same.
3 u - 15 = 1 u - 3
3 u - 1 u = 15 - 3
2 u = 12
1 u = 12 ÷ 2 = 6
Number of fruits in the end
= 1 u - 3 + 3 u - 15
= 4 u - 18
= 4 x 6 - 18
= 24 - 18
= 6
Answer(s): 6
