(370000*1.4-x)*(1.25*2*1.04)≥(370000*1.425-x)*(1.25*2)
    (370000*1.4-x)*(1.25*2*1.04)＞(370000*1.425-x)*(1.25*2)
    2x+5＞2x-1
    2x+5＞15x-1
    2x+5＞10x-1
    2x+5＞5x-1
    0.04x＜10540
    -0.04x＞-10540
    -1.04x+x＞484500-495040
    495040-1.04x＞484,500-x
    (370000*1.4-x)*1.04＞370000*1.425-x
    (370000*1.4-x)*(2.5*1.04)＞(370000*1.425-x)*(2.5)
    (370000*1.4-x)*(2.5*1.04)＞(370000*1.425-x)*(2.5)
    (370000*1.4-x)*(1.25*2*1.04)＞(370000*1.425-x)*(1.25*2)
    2x+5＞5x-1
    (2x^2-x+1)/2x+1＞0
    500-20x≧300
    (x+5)/2>10
    (2-3x)(2x+1)＞2
    25（1+1.5%）^8＜18（1+X）^8

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