5x+38-6(x-1)<55x+38-6(x-1)<1 5x+38-6(x-1)<1
    5x+38-6(x-1)<5 5x+38-6(x-1)<1
    p>4
    3x>4 4x>9
    3x>4
    2x+33-x
    2(x+1)>x+3
    (2x+1)/3>x-1
    3(x-2)>x-4
    (1440-x)/60+x/80<12
    1560≥30y+2000-50y
    30x+18*(2x+4)>699
    -sqrt(5)*t^2/5 -sqrt(5)*t/2<60t/7
    -sqrt(5)*t^2/5 -sqrt(5)*t/2>120t/7
    -sqrt(5)*t^2/5 -sqrt(5)*t/2>120/7
    -sqrt(5)*t^2/5 -sqrt(5)*t/2<=120/7
    -sqrt(5)*t^2/5 -sqrt(5)*t/2<120/7
    6x＋3≥42－9
    x*x*x+9*x*x+6<0
    x*x-3*x+4>0

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