At the concert hall, there were
18 as many girls as boys. After 94 girls came and 18 boys left the concert hall, there was an equal number of girls and boys who remained at the concert hall. How many children were at the concert hall in the end?
|
Girls |
Boys |
Before |
1 u |
8 u |
Change |
+ 94 |
- 18 |
After |
1 u + 94 |
8 u - 18 |
Number of children in the end is the same.
8 u - 18 = 1 u + 94
8 u - 1 u = 94 + 18
7 u = 112
1 u = 112 ÷ 7 = 16
Number of children in the end
= 2 x (1 u + 94)
= 2 u + 188
= 2 x 16 + 188
= 32 + 188
= 220
Answer(s): 220