1.
For the system of linear equations
2x+4y+2αz=bx+2y+3z=42x+5y+2z=8\begin{aligned} 2x + 4y + 2\alpha z &= b \\ x + 2y + 3z &= 4 \\ 2x + 5y + 2z &= 8 \end{aligned}

which of the following is NOT correct?