At the stadium, there were
57 as many girls as boys. After 86 girls came and 36 boys left the stadium, there was an equal number of girls and boys who remained at the stadium. How many children were at the stadium in the end?
|
Girls |
Boys |
Before |
5 u |
7 u |
Change |
+ 86 |
- 36 |
After |
5 u + 86 |
7 u - 36 |
Number of children in the end is the same.
7 u - 36 = 5 u + 86
7 u - 5 u = 86 + 36
2 u = 122
1 u = 122 ÷ 2 = 61
Number of children in the end
= 2 x (5 u + 86)
= 10 u + 172
= 10 x 61 + 172
= 610 + 172
= 782
Answer(s): 782