Question

in class 9 in number of boys is 5 more than number of girls and three times of number of girls is 12 more than double the number of boys find the number of boys and number of girl ​

Answer 1

Answer:

a = 27  and  b = 22

Step-by-step explanation:

Let,

No.of boys = a

No.of girls = b

a = 5 + b  ---> (1)

3b = 12 + 2a  ---> (2)

Substituting (1) in (2),

3b = 12 + 2(5 + b)

3b = 12 + 10 + 2b

3b - 2b = 22

b = 22

Substituting b = 22 in (1),

a = 5 + 22

a = 27

Hope it is useful...