Which system is not equivalent to x +y 1?


A.
[tex]x + y < 3 \\ - 2x + y < - 1[/tex]
B.
[tex] - x - y - 3 \\ 2x - y > 1[/tex]
C.
[tex]2x + y < 6 \\ 2x - y > 1[/tex]
D.
[tex]x + y < 3 \\ 2 \times + y < 1[/tex]
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