At a stadium, there were
25 as many adults as children at first. After 35 adults left, there were 107 more children than adults remaining at a stadium. How many children were at the stadium?
| |
Adults |
Children |
| Before |
2 u |
5 u |
| Change |
- 35 |
|
| After |
2 u - 35 |
5 u |
In the end, the number of children was 107 more than the number of adults. If another 107 adults entered the stadium, the number of children and adults would be the same.
5 u = 2 u - 35 + 107
5 u - 2 u = 107 - 35
3 u = 72
1 u = 72 ÷ 3 = 24
Number of children at first
= 5 u
= 5 x 24
= 120
Answer: 120
