Mathematics
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    180×10^6=1.0×14.3×250×x(465-1/2×x)
    -2x∧3-2x+1=0
    0=-200+110/(1+a)+121/(1+a)^2
    150*27.5x/(x+0.126)*150*(1-0.00205/3x)=360*157+200*157*(1.449-35x)/150-200*157*0.0018+240000*0.0126*50*0.167*3
    x%*15%+(70%-x%)*20%+30%*10%=13%
    x%*15%+(70%-x%)*20%+30%*10%=13%
    11x^3-14x+12=0
    2x^3-14x+3=0
    (1200/2x)-(1200/3x)=10
    1200/2x-1200/3x=10
    (155+271.5)/31*x+177/31*(x+15)+124/31(x+30)=1029
    3206.6*(1+y)^23=13*10^8*420
    987050000*(1+x)^23=1300000000
    9.8705*(1+x)^23=1300000000
    x
    x^3-8x^2+8x+24=0
    x3+8x2+8x+24=0
    x²-40x+24=0
    0.2*x-0.04*x=46000
    0.1*x-0.04*x=46000

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