If x = 1, y = 2 is a solution of the equation 3x + 2y = k, the value of k is ___.
Putting x = 1, y = 2 in the given equation, 3 x 1 + 2 x 2 = k ⇒ k = 7
Find the value of k for which the following pair of equation has no solution. x+2y=3;(k−1)x+(k+1)yk+2