Opal had an equal number of grapefruits and mangosteens at first. She sold one-fifth of the mangosteens and bought another 14 grapefruits. In the end, she had thrice as many grapefruits as mangosteens. Find the number of mangosteens she had at first.
| |
Grapefruits |
Mangosteens |
| Before |
12 u - 14 |
5 u |
| Change |
+ 14 |
- 1 u |
| After |
12 u |
4 u |
The number of grapefruits and mangosteens at first is the same.
12 u - 14 = 5 u
12 u - 5 u = 14
7 u = 14
1 u = 14 ÷ 7 = 2
Number of mangosteens that Opal had at first
= 5 u
= 5 x 2
= 10
Answer(s): 10
