At a bird park, there were
35 as many adults as children at first. After 26 adults left, there were 166 more children than adults remaining at a bird park. How many adults were at the bird park at first?
| |
Adults |
Children |
| Before |
3 u |
5 u |
| Change |
- 26 |
|
| After |
3 u - 26 |
5 u |
In the end, the number of children was 166 more than the number of adults. If another 166 adults entered the bird park, the number of children and adults would be the same.
5 u = 3 u - 26 + 166
5 u - 3 u = 166 - 26
2 u = 140
1 u = 140 ÷ 2 = 70
Number of adults at first
= 3 u
= 3 x 70
= 210
Answer: 210
