There were 245 kiwis and starfruits in a fruit stall.
310 of the kiwis and
37 of starfruits were sold. Given that there were 149 kiwis and starfruits left, how many kiwis were there in the fruit stall at first?
| |
Kiwis |
Starfruits |
| Before |
10 u |
7 p |
| Change |
- 3 u |
- 3 p |
| After |
7 u |
4 p |
10 u + 7 p = 245 --- (1)
7 u + 4 p = 149 --- (2)
Make p the same.
(1)
x 4 40 u + 28 p = 980 --- (3)
(2)
x 7 49 u + 28 p = 1043 --- (4)
(4) - (3)
49 u - 40 u = 1043 - 980
9 u = 63
1 u = 63 ÷ 9 = 7
Number of kiwis at first
= 10 u
= 10 x 7
= 70
Answer(s): 70
