At a zoo, there were
35 as many adults as children at first. After 73 adults left, there were 179 more children than adults remaining at a zoo. How many adults were at the zoo at first?
| |
Adults |
Children |
| Before |
3 u |
5 u |
| Change |
- 73 |
|
| After |
3 u - 73 |
5 u |
In the end, the number of children was 179 more than the number of adults. If another 179 adults entered the zoo, the number of children and adults would be the same.
5 u = 3 u - 73 + 179
5 u - 3 u = 179 - 73
2 u = 106
1 u = 106 ÷ 2 = 53
Number of adults at first
= 3 u
= 3 x 53
= 159
Answer: 159
