At a concert hall, there were
25 as many adults as children at first. After 46 adults left, there were 187 more children than adults remaining at a concert hall. How many adults were at the concert hall at first?
| |
Adults |
Children |
| Before |
2 u |
5 u |
| Change |
- 46 |
|
| After |
2 u - 46 |
5 u |
In the end, the number of children was 187 more than the number of adults. If another 187 adults entered the concert hall, the number of children and adults would be the same.
5 u = 2 u - 46 + 187
5 u - 2 u = 187 - 46
3 u = 141
1 u = 141 ÷ 3 = 47
Number of adults at first
= 2 u
= 2 x 47
= 94
Answer: 94
