At a museum, there were
47 as many adults as children at first. After 72 adults left, there were 156 more children than adults remaining at a museum. How many children were at the museum?
| |
Adults |
Children |
| Before |
4 u |
7 u |
| Change |
- 72 |
|
| After |
4 u - 72 |
7 u |
In the end, the number of children was 156 more than the number of adults. If another 156 adults entered the museum, the number of children and adults would be the same.
7 u = 4 u - 72 + 156
7 u - 4 u = 156 - 72
3 u = 84
1 u = 84 ÷ 3 = 28
Number of children at first
= 7 u
= 7 x 28
= 196
Answer: 196
