There were 291 mangoes and oranges in a fruit stall.
27 of the mangoes and
38 of oranges were sold. Given that there were 190 mangoes and oranges left, how many mangoes were there in the fruit stall at first?
|
Mangoes |
Oranges |
Before |
7 u |
8 p |
Change |
- 2 u |
- 3 p |
After |
5 u |
5 p |
7 u + 8 p = 291 --- (1)
5 u + 5 p = 190 --- (2)
Make p the same.
(1)
x 5 35 u + 40 p = 1455 --- (3)
(2)
x 8 40 u + 40 p = 1520 --- (4)
(4) - (3)
40 u - 35 u = 1520 - 1455
5 u = 65
1 u = 65 ÷ 5 = 13
Number of mangoes at first
= 7 u
= 7 x 13
= 91
Answer(s): 91