There were 132 mangosteens and chikoos in a stall at first. After
17 of the mangosteens and
12 of the chikoos were sold, there were a total of 101 mangosteens and chikoos now. How many mangosteens were there at first?
|
Mangosteens |
Chikoos |
Total |
Before |
7 u |
2 p |
132 |
Change |
- 1 u |
- 1 p |
- 31 |
After |
6 u |
1 p |
101 |
Total number of mangosteens and chikoos sold
= 132 - 101
= 31
6 u + 1 p = 101
1 p = 101 - 6 u --- (1)
1 u + 1 p = 31
1 p = 31 - 1 u --- (2)
(2) = (1)
31 - 1 u = 101 - 6 u
6 u - 1 u = 101 - 31
5 u = 70
1 u = 70 ÷ 5 = 14
Number of mangosteens at first
= 7 u
= 7 x 14
= 98
Answer(s): 98