(x-1)/4+2＜x-（2-3x）/6
    -3<=6-(5/3)x<4
    (0.8+2t+0.8*8.6)*(7.9t+91.07)/(11+t)/86>=1.6
    (1.4+2t+0.8*8.6)*(7.9t+94.21)/(11.3+t)/86>=1.6
    (0.6+2t+0.8*8.6)*(7.9t+94.21)/(11.3+t)/86>=1.6
    (0.6+2t+0.8*8.6)*(7.9t+91.85)/(10.9+t)/86>=1.6
    12+4x+10≥9-3x
    12+4x+1≥9-3x
    2x^2－3x＜0
    2≥4x
    （x-3）x-5≥0
    7X2+2X-5≤0
    2x－x^2＞0
    3x-2>=4x-2
    (x+5)/2-1>(3x+2)/3
    3x>3
    5x-3>2(3-2x)
    7x-8<9x
    5^7
    4x+8＜18-6x

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