Fanny had an equal number of guavas and grapefruits at first. She sold one-quarter of the grapefruits and bought another 84 guavas. In the end, she had twice as many guavas as grapefruits. Find the number of grapefruits she had at first.
| |
Grapefruits |
Guavas |
| Before |
4 u |
6 u - 84 |
| Change |
- 1 u |
+ 84 |
| After |
3 u |
6 u |
The number of guavas and grapefruits at first is the same.
6 u - 84 = 4 u
6 u - 4 u = 84
2 u = 84
1 u = 84 ÷ 2 = 42
Number of grapefruits that she had at first
= 4 u
= 4 x 42
= 168
Answer(s): 168
