Question

class 8




It is given that y varies directly with 2x + 6 and x = 3 when y = 12. Find the value of x when y = 30.

please give step by step answer


or faltu k answer mat dena ​

Answer 1

Answer:

Step-by-step explanation:

y α 2x + 6

y = k(2x + 6)

when y = 12, x = 3     [Given]

12 = k [ 2(3) + 6 ]

12 = k [ 6 + 6 ]

12 = 12k

k = 12

      12

k = 1

when y = 30,

y = kx

30 = 1 (2x + 6)

30 = 2x + 6

30 - 6 = 2x

24 = 2x

x = 24

       2

x = 12

when y = 30, x = 12

Answer 2

Step-by-step explanation:

It is given that y varies directly with 2x + 6 and x = 3 when y = 12. Find the value of x when y = 30.

please give step by step answer

or faltu k answer mat dena