Elyse had an equal number of apples and kiwis at first. She sold half of the kiwis and bought another 90 apples. In the end, she had four times as many apples as kiwis. Find the number of kiwis she had at first.
| |
Kiwis |
Apples |
| Before |
2 u |
4 u - 90 |
| Change |
- 1 u |
+ 90 |
| After |
1 u |
4 u |
The number of apples and kiwis at first is the same.
4 u - 90 = 2 u
4 u - 2 u = 90
2 u = 90
1 u = 90 ÷ 2 = 45
Number of kiwis that she had at first
= 2 u
= 2 x 45
= 90
Answer(s): 90
