There were 247 mangosteens and kiwis in a fruit stall.
27 of the mangosteens and
35 of kiwis were sold. Given that there were 134 mangosteens and kiwis left, how many mangosteens were there in the fruit stall at first?
|
Mangosteens |
Kiwis |
Before |
7 u |
5 p |
Change |
- 2 u |
- 3 p |
After |
5 u |
2 p |
7 u + 5 p = 247 --- (1)
5 u + 2 p = 134 --- (2)
Make p the same.
(1)
x 2 14 u + 10 p = 494 --- (3)
(2)
x 5 25 u + 10 p = 670 --- (4)
(4) - (3)
25 u - 14 u = 670 - 494
11 u = 176
1 u = 176 ÷ 11 = 16
Number of mangosteens at first
= 7 u
= 7 x 16
= 112
Answer(s): 112