At a concert hall, there were
47 as many adults as children at first. After 22 adults left, there were 199 more children than adults remaining at a concert hall. How many adults were at the concert hall at first?
|
Adults |
Children |
Before |
4 u |
7 u |
Change |
- 22 |
|
After |
4 u - 22 |
7 u |
In the end, the number of children was 199 more than the number of adults. If another 199 adults entered the concert hall, the number of children and adults would be the same.
7 u = 4 u - 22 + 199
7 u - 4 u = 199 - 22
3 u = 177
1 u = 177 ÷ 3 = 59
Number of adults at first
= 4 u
= 4 x 59
= 236
Answer: 236