Pamela had an equal number of kiwis and grapefruits at first. She sold half of the grapefruits and bought another 30 kiwis. In the end, she had four times as many kiwis as grapefruits. Find the number of grapefruits she had at first.
| |
Kiwis |
Grapefruits |
| Before |
4 u - 30 |
2 u |
| Change |
+ 30 |
- 1 u |
| After |
4 u |
1 u |
The number of kiwis and grapefruits at first is the same.
4 u - 30 = 2 u
4 u - 2 u = 30
2 u = 30
1 u = 30 ÷ 2 = 15
Number of grapefruits that Pamela had at first
= 2 u
= 2 x 15
= 30
Answer(s): 30
