4/x＞x+3
    x+3＜4/x
    3x-4<=6x-2 (2x+1)/3-1<(x-1)/2
    2m+7>0 4m-3>0
    2x-4(x-5)>=8 (2x-1)/2>2-x 2x+3<=x+7 (2x+5)/3-1>2-x
    1-a>0 2a+6<0
    2x+9>6x+1
    x-4<=2(x-1) 0.5(x+3)>x+1
    x+1>=2x-1 4x+5>2(x+1)
    3x-4<=6x-2
    (2x+1)/3-1<(x-1)/2
    (58-x)/ln(58/x)＞10
    1/6x+5
    0.25x+5
    0.5x+5
    3x-3<14x+35
    4-4（3x-2）≥0
    2x+9≥3（x+2）
    -2x＜8
    2x+3≥1

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