Question

X=1,y=2is a solution of the equation 2x+5y=k , then find the value of k.

Answer 1

Answer:

Given, equation is 5x + 2ky = 3k.

On putting x =1 and y =1 in this equation, we get

5(1) + 2k(1) =3k ⇒ 5 + 2k =3k

⇒ 5 = 3k - 2k ⇒ k = 5

Hence, required value of k is 5