There were 310 persimmons and oranges in a fruit stall.
27 of the persimmons and
35 of oranges were sold. Given that there were 135 persimmons and oranges left, how many persimmons were there in the fruit stall at first?
|
Persimmons |
Oranges |
Before |
7 u |
5 p |
Change |
- 2 u |
- 3 p |
After |
5 u |
2 p |
7 u + 5 p = 310 --- (1)
5 u + 2 p = 135 --- (2)
Make p the same.
(1)
x 2 14 u + 10 p = 620 --- (3)
(2)
x 5 25 u + 10 p = 675 --- (4)
(4) - (3)
25 u - 14 u = 675 - 620
11 u = 55
1 u = 55 ÷ 11 = 5
Number of persimmons at first
= 7 u
= 7 x 5
= 35
Answer(s): 35