At a stadium, there were
25 as many adults as children at first. After 60 adults left, there were 123 more children than adults remaining at a stadium. How many children were at the stadium?
| |
Adults |
Children |
| Before |
2 u |
5 u |
| Change |
- 60 |
|
| After |
2 u - 60 |
5 u |
In the end, the number of children was 123 more than the number of adults. If another 123 adults entered the stadium, the number of children and adults would be the same.
5 u = 2 u - 60 + 123
5 u - 2 u = 123 - 60
3 u = 63
1 u = 63 ÷ 3 = 21
Number of children at first
= 5 u
= 5 x 21
= 105
Answer: 105
