(9.5*t+235)*(2*t+28.4+8.64)≥1.6*108*(t+27)
    (9.8*t+161.6)*(2*t+17.04)≥1.6*108*(t+17)
    （9.8*t+161.6）*(2*t+17.04)≥16*108*（t+17）
    4>(1.5+0.7*2+3*0.8)/(1+X%)
    4>(2+2+2)/(1+X%)
    4>(2+2)/(1+X%)
    4>(2+1.5+2*0.7)/(1+X%)
    4>(2+2+1.5)/(1+X%)
    4>(1.5+2+3*0.8)/(1+X%)
    4>(1.5+2+1.5+3*0.8*0.7)/(1+X%)
    4>(1.5+1.5+3*0.8*0.7)/(1+X%)
    4>(2+2+1.5+3*0.8*0.7)/(1+X%)
    4>(2+2+3*0.8)/(1+X%)
    4>(1.5+2+3*0.8)/(1+X%)
    4>(1.5+2+3*0.8*0.7)/(1+X%)
    4>(1.5+1.5+3*0.8*0.7)/(1+X%)
    4>(2+3*0.8)/(1+X%)
    4>(1.5+3*0.8)/(1+X%)
    4>(1.5+3*0.8*0.7)/(1+X%)
    4<(1.5+3*0.8*0.7)/(1+X%)

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