At a concert hall, there were
27 as many adults as children at first. After 73 adults left, there were 113 more children than adults remaining at a concert hall. How many children were at the concert hall?
| |
Adults |
Children |
| Before |
2 u |
7 u |
| Change |
- 73 |
|
| After |
2 u - 73 |
7 u |
In the end, the number of children was 113 more than the number of adults. If another 113 adults entered the concert hall, the number of children and adults would be the same.
7 u = 2 u - 73 + 113
7 u - 2 u = 113 - 73
5 u = 40
1 u = 40 ÷ 5 = 8
Number of children at first
= 7 u
= 7 x 8
= 56
Answer: 56
