A classroom contained an equal number of boys and girls . 8 girls left to play hockey, leaving twice as many boys as girls in class room.What was...

We'll put the number of boys or girls as
x.

If 8 girls left to play hockey, the total number of
students is:

x-8

The number of
boys is twice the number of girls:

2(x-8) =
x

We'll remove the brackets and we'll
get:

2x - 16 = x

We'll
subtract x both sides and we'll add 16 both sides:

x =
16

The number of boys is 16 and the number of girls is also
16.

Initially, the total number of students
present in classroom is:

16+16
= 32.