(8215+x)/(14025+x)＞0.9
    (8215+x)/(14025+x)＞0.7
    (8215+x)/(14025+x)＞0.79
    (8215+x)/(14025+x)＞0.80
    (8215+x)/(14025+x)＞0.8
    (8215+x)/(14025+x)＞0.62
    (8215+x)/(14025+x)＞0.61
    (8215+x)/(14025+x)＞0.6
    (8215+x)/(14025+x)＞0.59
    log（x,2）>3
    log（x,27）>2
    (1.3a-158)/158>(a-117.12)/117.12
    5(x-2)-1≤4(1+x) (1) x-1>6(x+3) (2)
    5(x-2)-1≤4(1+x) x-1>6(x+3)
    5(x-2)-1≤4(1+x)
    x-1>6(x+3)
    1-(4x-5)/2<=5/6-(4/3)x
    (2-3x)/4>=(5x+1)/3
    0.01x>0.2(x-77)
    （140500+a）÷17＞（219400+a）÷26

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