There were 292 oranges and pears in a fruit stall.
27 of the oranges and
35 of pears were sold. Given that there were 130 oranges and pears left, how many oranges were there in the fruit stall at first?
|
Oranges |
Pears |
Before |
7 u |
5 p |
Change |
- 2 u |
- 3 p |
After |
5 u |
2 p |
7 u + 5 p = 292 --- (1)
5 u + 2 p = 130 --- (2)
Make p the same.
(1)
x 2 14 u + 10 p = 584 --- (3)
(2)
x 5 25 u + 10 p = 650 --- (4)
(4) - (3)
25 u - 14 u = 650 - 584
11 u = 66
1 u = 66 ÷ 11 = 6
Number of oranges at first
= 7 u
= 7 x 6
= 42
Answer(s): 42