x-1=(2x-3)/2
    x-1=2x-3/2
    (X＋2)÷4－1＝(2X－3)÷6
    X－1/2(3X－2)＝2（5－X）
    X－1/2(3X－2)＝2(5－X)
    x^2+（1.21^2-2*1.21）*（1-x）^2+2*1.21*1.21*lnx+2*1.21*1.21*（1-x）=0
    t(5-t)=6
    x^2+（0.89^2-2*0.89）*（1-x）^2+2*0.89*0.89*lnx+2*0.89*0.89*（1-x）=0
    4x=x+5
    0.4*（x-0.8）=0.75*(x-2.1*2-0.8)
    1×(1+1%)^n
    x^2+(24/5)^2=(x+18/5)^2
    （1.5x-x）*1.5=350
    （1.5x-x）*1.5
    0.1451sin(x)+0.21362*cos(x)+5.6545*cos(x)*sin(x/2)-0.071207 = 0
    0.1451sin(x)+0.21362*cos(x)+4.37998*cos(x)*sin(x/2)-0.071207 = 0
    0.11786sin(x)+0.4055*cos(x)+3.68144*cos(x)*sin(x/2)-0.13516 = 0
    0.11786sin(x)+0.4055*cos(x)+4.752704*cos(x)*sin(x/2)-0.13516 = 0
    0.0775sin(x)+0.5601*cos(x)+3.50594*cos(x)*sin(x/2)-0.18671 = 0
    0.0775sin(x)+0.5601*cos(x)+2.7157*cos(x)*sin(x/2)-0.18671 = 0

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