Mathematics
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    5x一11=2x+10
    2x+10=5X-11
    9+5x²+15=0
    9+5x+5x²=6
    X×(70-2x)=600
    x(70-2x)=600
    70-2x²=600
    35x-x²=600
    10x²+6√10x+9=0
    35x-x²=150
    300x-x²=300
    6290.3×π×0.0046×(50-x)=125×0.32738×(x-38)
    (1+x)(1000-50x)=10000
    4cos(7x)*cos(13x)*sin(6x)*sin(6x)=sin(25x)*sin(5x)
    2cos(7x)*cos(13x)*sin(6x)*sin(6x)=sin(25x)*sin(5x)
    2cos(7x)*cos(13x)*sin(6x)*sin(6x)=sin(25x)*sin(5x)
    6290.3×π×0.0046×(50-x)=144.36×0.32738×(x-38)
    80000000+53246007X/177535710=0.85X
    367x^2-33.3x+0.48=0
    12x^2-8x-3=0

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