At a zoo, there were
47 as many adults as children at first. After 41 adults left, there were 143 more children than adults remaining at a zoo. How many children were at the zoo?
| |
Adults |
Children |
| Before |
4 u |
7 u |
| Change |
- 41 |
|
| After |
4 u - 41 |
7 u |
In the end, the number of children was 143 more than the number of adults. If another 143 adults entered the zoo, the number of children and adults would be the same.
7 u = 4 u - 41 + 143
7 u - 4 u = 143 - 41
3 u = 102
1 u = 102 ÷ 3 = 34
Number of children at first
= 7 u
= 7 x 34
= 238
Answer: 238
