Cathy had an equal number of guavas and kiwis at first. She sold half of the kiwis and bought another 81 guavas. In the end, she had five times as many guavas as kiwis. Find the number of kiwis she had at first.
| |
Kiwis |
Guavas |
| Before |
2 u |
5 u - 81 |
| Change |
- 1 u |
+ 81 |
| After |
1 u |
5 u |
The number of guavas and kiwis at first is the same.
5 u - 81 = 2 u
5 u - 2 u = 81
3 u = 81
1 u = 81 ÷ 3 = 27
Number of kiwis that she had at first
= 2 u
= 2 x 27
= 54
Answer(s): 54
