At a zoo, there were
27 as many adults as children at first. After 29 adults left, there were 159 more children than adults remaining at a zoo. How many adults were at the zoo at first?
|
Adults |
Children |
Before |
2 u |
7 u |
Change |
- 29 |
|
After |
2 u - 29 |
7 u |
In the end, the number of children was 159 more than the number of adults. If another 159 adults entered the zoo, the number of children and adults would be the same.
7 u = 2 u - 29 + 159
7 u - 2 u = 159 - 29
5 u = 130
1 u = 130 ÷ 5 = 26
Number of adults at first
= 2 u
= 2 x 26
= 52
Answer: 52