There were 270 apples and lemons in a fruit stall.
37 of the apples and
35 of lemons were sold. Given that there were 180 apples and lemons left, how many apples were there in the fruit stall at first?
|
Apples |
Lemons |
Before |
7 u |
5 p |
Change |
- 3 u |
- 3 p |
After |
4 u |
2 p |
7 u + 5 p = 270 --- (1)
4 u + 2 p = 180 --- (2)
Make p the same.
(1)
x 2 14 u + 10 p = 540 --- (3)
(2)
x 5 20 u + 10 p = 900 --- (4)
(4) - (3)
20 u - 14 u = 900 - 540
6 u = 360
1 u = 360 ÷ 6 = 60
Number of apples at first
= 7 u
= 7 x 60
= 420
Answer(s): 420