Use Cramer's rule to find zzz in the system: {x+2y+3z=142x−y+z=53x+y−z=2\begin{cases} x + 2y + 3z = 14 \\ 2x - y + z = 5 \\ 3x + y - z = 2 \end{cases}⎩⎨⎧x+2y+3z=142x−y+z=53x+y−z=2
z=2z = 2z=2
z=175z = \frac{17}{5}z=517
z=8525=3.4z = \frac{85}{25} = 3.4z=2585=3.4
z=5z = 5z=5