Anna had an equal number of pears and mangosteens at first. She sold one-sixth of the mangosteens and bought another 18 pears. In the end, she had thrice as many pears as mangosteens. Find the number of mangosteens she had at first.
| |
Pears |
Mangosteens |
| Before |
15 u - 18 |
6 u |
| Change |
+ 18 |
- 1 u |
| After |
15 u |
5 u |
The number of pears and mangosteens at first is the same.
15 u - 18 = 6 u
15 u - 6 u = 18
9 u = 18
1 u = 18 ÷ 9 = 2
Number of mangosteens that Anna had at first
= 6 u
= 6 x 2
= 12
Answer(s): 12
