At a park, there were
35 as many adults as children at first. After 53 adults left, there were 143 more children than adults remaining at a park. How many children were at the park?
|
Adults |
Children |
Before |
3 u |
5 u |
Change |
- 53 |
|
After |
3 u - 53 |
5 u |
In the end, the number of children was 143 more than the number of adults. If another 143 adults entered the park, the number of children and adults would be the same.
5 u = 3 u - 53 + 143
5 u - 3 u = 143 - 53
2 u = 90
1 u = 90 ÷ 2 = 45
Number of children at first
= 5 u
= 5 x 45
= 225
Answer: 225