At a zoo, there were
37 as many adults as children at first. After 63 adults left, there were 147 more children than adults remaining at a zoo. How many children were at the zoo?
|
Adults |
Children |
Before |
3 u |
7 u |
Change |
- 63 |
|
After |
3 u - 63 |
7 u |
In the end, the number of children was 147 more than the number of adults. If another 147 adults entered the zoo, the number of children and adults would be the same.
7 u = 3 u - 63 + 147
7 u - 3 u = 147 - 63
4 u = 84
1 u = 84 ÷ 4 = 21
Number of children at first
= 7 u
= 7 x 21
= 147
Answer: 147