Rachel had an equal number of guavas and mangosteens at first. She sold one-third of the mangosteens and bought another 25 guavas. In the end, she had four times as many guavas as mangosteens. Find the number of mangosteens she had at first.
| |
Guavas |
Mangosteens |
| Before |
8 u - 25 |
3 u |
| Change |
+ 25 |
- 1 u |
| After |
8 u |
2 u |
The number of guavas and mangosteens at first is the same.
8 u - 25 = 3 u
8 u - 3 u = 25
5 u = 25
1 u = 25 ÷ 5 = 5
Number of mangosteens that Rachel had at first
= 3 u
= 3 x 5
= 15
Answer(s): 15
