There were 82 mangosteens and passion fruits in a stall at first. After
15 of the mangosteens and
12 of the passion fruits were sold, there were a total of 62 mangosteens and passion fruits now. How many mangosteens were there at first?
| |
Mangosteens |
Passion Fruits |
Total |
| Before |
5 u |
2 p |
82 |
| Change |
- 1 u |
- 1 p |
- 20 |
| After |
4 u |
1 p |
62 |
Total number of mangosteens and passion fruits sold
= 82 - 62
= 20
4 u + 1 p = 62
1 p = 62 - 4 u --- (1)
1 u + 1 p = 20
1 p = 20 - 1 u --- (2)
(2) = (1)
20 - 1 u = 62 - 4 u
4 u - 1 u = 62 - 20
3 u = 42
1 u = 42 ÷ 3 = 14
Number of mangosteens at first
= 5 u
= 5 x 14
= 70
Answer(s): 70
