There were 291 chikoos and starfruits in a fruit stall.
27 of the chikoos and
35 of starfruits were sold. Given that there were 156 chikoos and starfruits left, how many chikoos were there in the fruit stall at first?
|
Chikoos |
Starfruits |
Before |
7 u |
5 p |
Change |
- 2 u |
- 3 p |
After |
5 u |
2 p |
7 u + 5 p = 291 --- (1)
5 u + 2 p = 156 --- (2)
Make p the same.
(1)
x 2 14 u + 10 p = 582 --- (3)
(2)
x 5 25 u + 10 p = 780 --- (4)
(4) - (3)
25 u - 14 u = 780 - 582
11 u = 198
1 u = 198 ÷ 11 = 18
Number of chikoos at first
= 7 u
= 7 x 18
= 126
Answer(s): 126