At the tourist attraction, there were
17 as many girls as boys. After 78 girls came and 12 boys left the tourist attraction, there was an equal number of girls and boys who remained at the tourist attraction. How many children were at the tourist attraction in the end?
| |
Girls |
Boys |
| Before |
1 u |
7 u |
| Change |
+ 78 |
- 12 |
| After |
1 u + 78 |
7 u - 12 |
Number of children in the end is the same.
7 u - 12 = 1 u + 78
7 u - 1 u = 78 + 12
6 u = 90
1 u = 90 ÷ 6 = 15
Number of children in the end
= 2 x (1 u + 78)
= 2 u + 156
= 2 x 15 + 156
= 30 + 156
= 186
Answer(s): 186
