There were 47 starfruits and chikoos in a stall at first. After
15 of the starfruits and
12 of the chikoos were sold, there were a total of 31 starfruits and chikoos now. How many starfruits were there at first?
| |
Starfruits |
Chikoos |
Total |
| Before |
5 u |
2 p |
47 |
| Change |
- 1 u |
- 1 p |
- 16 |
| After |
4 u |
1 p |
31 |
Total number of starfruits and chikoos sold
= 47 - 31
= 16
4 u + 1 p = 31
1 p = 31 - 4 u --- (1)
1 u + 1 p = 16
1 p = 16 - 1 u --- (2)
(2) = (1)
16 - 1 u = 31 - 4 u
4 u - 1 u = 31 - 16
3 u = 15
1 u = 15 ÷ 3 = 5
Number of starfruits at first
= 5 u
= 5 x 5
= 25
Answer(s): 25
