6>x>x^2/3
    6>x>9
    3X+4≥X 2-4X≥-2
    -1≤X/3 1-X≥-3
    2X+1≥X 3X-5≤1
    2X≥3X-4 4X-1≥3
    3X+1≥2X-1 4X-2≤X+1
    3X+2≥-4 2X-1≤1
    2X+1>X+2 3X-5/2≤X-1
    2-3（X-2）≥X 3X+6>2X+2
    x²-3x+3≥-1
    6x>500
    X+3≥2X， 2X≤3X+1
    2X-3≥-5， 3X-1≤8
     ( ( x * 3 + 30 ) * 0.65 + 6.99 ) * 0.91 - 9 - 2 * x >10
     ( ( x * 3 + 30 ) * 0.75 + 5.99 ) * 0.94 - 15 - 2*x >11
     ( ( x * 3 + 30 ) * 0.65 + 5.99 ) * 0.94 - 15 - x >11
     ( ( x * 3 + 30 ) * 0.65 + 5.99 ) * 0.94 - 15 - 2 * x >11
    ( ( x * 3 + 30 ) * 0.6 + 5.99 ) * 0.94 - 15 - x >11
    ( ( x * 3 + 30 ) * 0.75 + 5.99 ) * 0.94 - 15 - 2x >11

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