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1.
5 - 3x >= 11
-3x >= 11-5
-3x >= 6
3x <= -6
x <= -6/3
x <= -2
x ∈ (-∞ ; -2]
2.
1 + 3x >= - 5
3x >= -5 - 1
3x >= -6
x >= -6/3
x >= - 2
x ∈ [-2 ; + ∞)
3.
5x + 7 >= 17
5x >= 10
x >= 10/5
x >= 2
x ∈ [2 ; + ∞)
4.
2x + 1 <= 3
2x <= 2
x <= 1
x ∈ (-∞ ; 1]
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