Question

in class 9A number of boys is 5 more than number of girls and 3 time s of number of girls is 12 more than double the number of boys and number of girls​

Answer 1

Answer:

Let boys be x

and girls be y

x = 5+y

now three times no. of girls =3y

and it is equal to 12+2(y+5)

so, we can say that

3y = 12+2(y+5)

3y = 12 + 2y +10

3y - 2y = 22

y = 22

x= 5 + y

x = 5 +22

x = 27

number of boys = 27

and number of girls = 22

I hope it helps you

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Answer 2

Answer:

Boys = 27

Girls = 22

Step-by-step explanation:

Let no. of girls = x

Let no. of boys = y

y = x + 5

x-y = -5

2x-2y = -10...................i

Also

3x = 12 + 2y

3x - 2y = 12....................ii

Subtract eq i from eq ii

3x - 2y - 2x + 2y = 12 -(-10)

x = 22

y = 22+ 5 = 27

Boys = 27

Boys = 27Girls = 22