At the museum, there were
511 as many girls as boys. After 85 girls came and 29 boys left the museum, there was an equal number of girls and boys who remained at the museum. How many children were at the museum in the end?
|
Girls |
Boys |
Before |
5 u |
11 u |
Change |
+ 85 |
- 29 |
After |
5 u + 85 |
11 u - 29 |
Number of children in the end is the same.
11 u - 29 = 5 u + 85
11 u - 5 u = 85 + 29
6 u = 114
1 u = 114 ÷ 6 = 19
Number of children in the end
= 2 x (5 u + 85)
= 10 u + 170
= 10 x 19 + 170
= 190 + 170
= 360
Answer(s): 360