66y+y=0.72
    66y+y=0.72
    0.6y+y=0.72
    0.6y+y=0.72
    0.6y+y=0.72
    0.6y+y=0.72
    0.6y+y=0.72
    0.6y+y=0.72
    11%＝0.6×（1＋g）/12＋g
    X-X/1.03*0.03*1.12-X*0.025=12296728
    3(2X+4）=2(2X+8)
    X-X*1.03*0.03*1.12-X*0.025=12296728
    145000000=13.8*250x（460-x/2）
    190x+2850000=0
    x²-920x+84058=0
    x²-920x+8406=0
    6.22*(3.7+t)^2*（1.27+2/3*t）-15.24*t^2*(2.5+2/3*t)=0
    6.22*(3.7+t)^2*（1.27+2/3*t）-14.98*t^2*(2.5+2/3*t)=0
    6/(59+x)=4/（4+x）
    x^2＋x^2/(x＋1)^2=3

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