At a bird park, there were
37 as many adults as children at first. After 66 adults left, there were 122 more children than adults remaining at a bird park. How many children were at the bird park?
| |
Adults |
Children |
| Before |
3 u |
7 u |
| Change |
- 66 |
|
| After |
3 u - 66 |
7 u |
In the end, the number of children was 122 more than the number of adults. If another 122 adults entered the bird park, the number of children and adults would be the same.
7 u = 3 u - 66 + 122
7 u - 3 u = 122 - 66
4 u = 56
1 u = 56 ÷ 4 = 14
Number of children at first
= 7 u
= 7 x 14
= 98
Answer: 98
