Question

4/7 of the children in the hall are girls and the rest are boys. If there are 12 more girls than boys, how many children are there in the hall?

Answer 1

Let
Total number of children=x
Girls=4x/7
Boys=x-4x/7=3x/7
And
Girls=boys+12
=》4x/7=3x/7+12
=》4x-3x/7=12
=》x=84
,', There are 84num of children in the hall