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z in (-oo:+oo)
-3*z-(2/2) < 2 // - 2
-3*z-(2/2)-2 < 0
-3*z-2-1 < 0
-3*z-3 < 0 // + 3
-3*z < 3 // : -3
z > 3/(-3)
z > -1
z in (-1:+oo)
(-1:+oo)
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