At the safari park, there were
18 as many boys as girls. After 56 boys came and 35 girls left the safari park, there was an equal number of boys and girls who remained at the safari park. How many children were at the safari park in the end?
|
Boys |
Girls |
Before |
1 u |
8 u |
Change |
+ 56 |
- 35 |
After |
1 u + 56 |
8 u - 35 |
Number of children in the end is the same.
8 u - 35 = 1 u + 56
8 u - 1 u = 56 + 35
7 u = 91
1 u = 91 ÷ 7 = 13
Number of children in the end
= 2 x (1 u + 56)
= 2 u + 112
= 2 x 13 + 112
= 26 + 112
= 138
Answer(s): 138