There were 88 mangosteens and apples in a stall at first. After
16 of the mangosteens and
12 of the apples were sold, there were a total of 68 mangosteens and apples now. How many mangosteens were there at first?
| |
Mangosteens |
Apples |
Total |
| Before |
6 u |
2 p |
88 |
| Change |
- 1 u |
- 1 p |
- 20 |
| After |
5 u |
1 p |
68 |
Total number of mangosteens and apples sold
= 88 - 68
= 20
5 u + 1 p = 68
1 p = 68 - 5 u --- (1)
1 u + 1 p = 20
1 p = 20 - 1 u --- (2)
(2) = (1)
20 - 1 u = 68 - 5 u
5 u - 1 u = 68 - 20
4 u = 48
1 u = 48 ÷ 4 = 12
Number of mangosteens at first
= 6 u
= 6 x 12
= 72
Answer(s): 72
