At a bird park, there were
47 as many adults as children at first. After 58 adults left, there were 148 more children than adults remaining at a bird park. How many children were at the bird park?
|
Adults |
Children |
Before |
4 u |
7 u |
Change |
- 58 |
|
After |
4 u - 58 |
7 u |
In the end, the number of children was 148 more than the number of adults. If another 148 adults entered the bird park, the number of children and adults would be the same.
7 u = 4 u - 58 + 148
7 u - 4 u = 148 - 58
3 u = 90
1 u = 90 ÷ 3 = 30
Number of children at first
= 7 u
= 7 x 30
= 210
Answer: 210