Question: Consider the system w 3 x + 5 y z = 1 2 w x 2 y + z = 0 w 7 y +

 Consider the system
w 3x +5y z =1
2w x 2y + z =0
w 7y +7z =1
Show that the set of solutions of (S) is not a vector subspace of R
4
.

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