There were 292 passion fruits and pears in a fruit stall.
310 of the passion fruits and
37 of pears were sold. Given that there were 172 passion fruits and pears left, how many passion fruits were there in the fruit stall at first?
|
Passion Fruits |
Pears |
Before |
10 u |
7 p |
Change |
- 3 u |
- 3 p |
After |
7 u |
4 p |
10 u + 7 p = 292 --- (1)
7 u + 4 p = 172 --- (2)
Make p the same.
(1)
x 4 40 u + 28 p = 1168 --- (3)
(2)
x 7 49 u + 28 p = 1204 --- (4)
(4) - (3)
49 u - 40 u = 1204 - 1168
9 u = 36
1 u = 36 ÷ 9 = 4
Number of passion fruits at first
= 10 u
= 10 x 4
= 40
Answer(s): 40