At a park, there were
35 as many adults as children at first. After 31 adults left, there were 153 more children than adults remaining at a park. How many adults were at the park at first?
| |
Adults |
Children |
| Before |
3 u |
5 u |
| Change |
- 31 |
|
| After |
3 u - 31 |
5 u |
In the end, the number of children was 153 more than the number of adults. If another 153 adults entered the park, the number of children and adults would be the same.
5 u = 3 u - 31 + 153
5 u - 3 u = 153 - 31
2 u = 122
1 u = 122 ÷ 2 = 61
Number of adults at first
= 3 u
= 3 x 61
= 183
Answer: 183
