At a museum, there were
37 as many adults as children at first. After 23 adults left, there were 111 more children than adults remaining at a museum. How many children were at the museum?
|
Adults |
Children |
Before |
3 u |
7 u |
Change |
- 23 |
|
After |
3 u - 23 |
7 u |
In the end, the number of children was 111 more than the number of adults. If another 111 adults entered the museum, the number of children and adults would be the same.
7 u = 3 u - 23 + 111
7 u - 3 u = 111 - 23
4 u = 88
1 u = 88 ÷ 4 = 22
Number of children at first
= 7 u
= 7 x 22
= 154
Answer: 154