There were 129 oranges and pomegranates in a stall at first. After
17 of the oranges and
12 of the pomegranates were sold, there were a total of 102 oranges and pomegranates now. How many oranges were there at first?
|
Oranges |
Pomegranates |
Total |
Before |
7 u |
2 p |
129 |
Change |
- 1 u |
- 1 p |
- 27 |
After |
6 u |
1 p |
102 |
Total number of oranges and pomegranates sold
= 129 - 102
= 27
6 u + 1 p = 102
1 p = 102 - 6 u --- (1)
1 u + 1 p = 27
1 p = 27 - 1 u --- (2)
(2) = (1)
27 - 1 u = 102 - 6 u
6 u - 1 u = 102 - 27
5 u = 75
1 u = 75 ÷ 5 = 15
Number of oranges at first
= 7 u
= 7 x 15
= 105
Answer(s): 105