0.948×10^5×14.63^1.77÷X^4.77×110×0.412≤0.2×20
    0.948×10^5×14.63^1.74÷X^4.77×110×0.412<0.2×20
    x^2-sqrt3*x-1≤0
    0.861×10^5×15.68^1.74÷X^4.71×72×0.499<0.2×25
    100x+50(100-x)<=7650
    1+x>3
    x+3(100-x)>=250
    2x+(100-x)>=120
    3x-1/2+1>2x
    4＜x＋10＞＝5x
    5>-5X
    2-x≥1/6
    3*2^(x-3)*(15-x)≥(3*2^(x-3)-1)*14
    3*2^(x-3)*(14-x)＜(3*2^(x-3)-1)*13
    3*2^(x-3)*(9-x)＜(3*2^(x-3)-1)*8
    3*2^(x-3)*(10-x)≥(3*2^(x-3)-1)*9
    x^2＋x-2≥0
    x^2＋x-2＞0
    x^2＋59x－2400＜0
    2（5-x)<7-x

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