Mathematics
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    3(x-1)+1>5x-2(1-X)
    6x^2-126x+659<0
    (1.6x-x)×200+(1.3x-x)×100+(0.7x-x)×100=15000
    10x+9x≤30900-2400
    (2x-1)/5≤(x+1)/2
    x-3(x-2)>4
    x+2/3(30-x)≤41 x+2/3(30-x)≥40
    (x+4)/3-(3x-1)/2>1
    x-(x-1)/2>2-(x+2)/5
    ((x-3)/4)>1-(3(x+1)/8)
    0.5x+2-x+(2/3)<2
    (50+x)×(600-5x)≥33000
    x+1<5 2(x+4)>3x+7
    5x+1>3(x-1) 1/2x-2≤4-1.5x
    5x+1>3(x-1) 1/2x-2≤4-1.5
    5x-1<2x+5 x-1≤3x+1
    2x+1≥-1 2x+1≤3
    3x+1≥5x (x-1)/2≥-2
    (x-1)/2≤(x-2)/3+1
    X-1<2/X

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