1.
If the system of linear equations
2x+3yz=2x+y+z=4xy+λz=4λ4\begin{aligned} 2x + 3y - z &= -2 \\ x + y + z &= 4 \\ x - y + \lambda z &= 4\lambda - 4 \end{aligned}

where λR\lambda \in \mathbb{R}, has no solution, then: