1.
The value of k∈Rk \in \mathbb{R}, for which the following system of linear equations
3x−y+4z=3,3x - y + 4z = 3,

x+2y−3z=−2,x + 2y - 3z = -2,

6x+5y+kz=−36x + 5y + kz = -3

has infinitely many solutions, is: