Question

let girls =x and boys=x-5
so-
x+x-5=15
finally girls are 10 and boys are 5

Answer 1

x+x-5=15
2x=15+5
2x=20
x=20/2
x=10.

Girls=x=10
Boys=x-5=10-5=5.

Answer 2

Let girls = x
Boys = x - 5

Girls + boys = 15

x + x- 5= 15

x +x = 15 + 5

2x = 20

x = 10

Girls = 10

Boys = 5

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@sunita