\left\{ \begin{array}{l}{ x + y - 3 w = 0 }\\{ x - 3 z = 2 }\\{ 5 y - z + w = 6 }\\{ 2 x + 3 y - 5 w = 2 }\end{array} \right.
Solve for x, y, w, z
x=2
y=1
z=0
w=1
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