15%x-10%x=120+120
    15%x-120=10%x+120
    24x^5-15x^4+40x^3-30x^2+120x+1=0
    1-a/(1.66+a)+1/6.28318530718sin(6.28318530718a/(1.66+a)) = 1/(2*0.639301)
    ln(x/0.00187)＝(277000/8.314)(1/600—1/700)
    x+1＝1
    （26.274+x）×1.95＝52.549+70.623-x
    （26.274+x）×2.15＝52.549+70.623-x
    （26.274+x）×2.35＝52.549+70.623-x
    （26.274+x）×2.55＝52.549+70.623-x
    1-a/(1.66+a)+1/6.28318530718sin(6.28318530718a/(1.66+a)) = 1/(2*2.31141)
    1-a/(1.66+a)+1/6.28318530718sin(6.28318530718a/(1.66+a)) = 1/(2*2.344289)
    6:0.5=x:2/3
    （26.307+x）×2.75＝52.613+70.22-x
    （26.307+x）×2.55＝52.613+70.22-x
    （26.307+x）×2.35＝52.613+70.22-x
    （26.307+x）×2.15＝52.613+70.22-x
    （26.307+x）×1.95＝52.613+70.72-x
    （26.307+x）×2.15＝52.613+70.72-x
    （26.307+x）×2.35＝52.613+70.72-x

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