0.079788×e^(((x-90)÷7)^2)=0.05699×e^(((x-100)÷5)^2)
    0.079788×e((x-90)÷7)^2=0.05699×e((x-100)÷5)^2
    ((x-90)÷7)^2-((x-100)÷5)^2=-0.6729
    ((x-160)÷6)^2-((x-180)÷8)^2=-0.5753527
    25x^2 +1431x+20736=0
    ((x-90)÷7)^2-((x-100)÷5)^2=-0.6729
    6x+12=0
    x（lnx+3.1）=0.3
    x（lnx+3.1）=0.36
    x（lnx+3.44）=0.098
    xln3.44x=0.098
    xln3.744x=0.098
    x(ln3.744x)=0.098
    x(lnx+3.44)=0.098
    x(lnx+3.1)=0.3538
    x(lnx+3.1)=0.22
    x(lnx+3.1)=0.33
    19y^2+37y-3=0
    19y^2+37y-3=0
    0.1x/1.05*0.05=x-487800

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