At the museum, there were
37 as many boys as girls. After 97 boys came and 39 girls left the museum, there was an equal number of boys and girls who remained at the museum. How many children were at the museum in the end?
|
Boys |
Girls |
Before |
3 u |
7 u |
Change |
+ 97 |
- 39 |
After |
3 u + 97 |
7 u - 39 |
Number of children in the end is the same.
7 u - 39 = 3 u + 97
7 u - 3 u = 97 + 39
4 u = 136
1 u = 136 ÷ 4 = 34
Number of children in the end
= 2 x (3 u + 97)
= 6 u + 194
= 6 x 34 + 194
= 204 + 194
= 398
Answer(s): 398