2x+1>-1 (2x-1)/3>x-1
    ((7-x)/2)-3>((3+4x)/5)-4 ((5/3)x)+5(4-x)<2(4-x)
    3x+4>2x ((x+2)/5)-((x-3)/4)>1
    (x-3)/2+5>=x+3
    3x+2>2x 1-((x-1)/3)>(x+1)/2
    17x+10(80-x)≤500
    3x-1>x+4
    (x+1)/4>(x-1)/2
    2x+1>4(x-1) ((x+1)/4)-((x-1)/3)<1
    5x+4<2x-2 2(x-1)>3(x+1)
    x-((x+1)/2)>1/2 x+8<4x-1
    2(x-1)<4x+2 (x+1)/4>(x-1)/2
    3x-1>x+4 x+1>(4x-1)/3
    3(x-1)+9>5x (3x-1)/2>-2
    2x-7<3(x-1) ((4/3)x)+3<1-(2/3)x
    2x>(x+7)/2
    5x-2<3x+4 2x>(x+7)/2
    3x-2<4 2(x-1)<3x+1
    ((2x-1)/3)-(5x+1)/2<1 5x-1<3(x+1)
    x-1>2x (x-1)/2

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