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    3x(400-2X)+4X+5X=1560
    x+x*0.07=9.31
    x-x/1.01*0.01*1.12=374641.51
    12.7x=4.7
    60+300*x=80+250*x
    x^2=2^x
     x^2+0.052x-0.10044=0
    v=50/0.1*[1-1/1.1^6]+1.2v/1.1^6
    9n²-n=162
    2x*x+4*x-5=0
    (5-x)/2320000 =10^(-3) [4.3 x − (x^2)/2]
    X^2+10=8 x- 1
    12x-4x=2x
    12x-4x=2x2
    x=(e^((5-5700x)/0.026))10^(-14)
    x=(e^((5-5700x)/0.026))*10^(-14)
    x=(e^((5-5700x)/0.026))*10^(-14)
    91.2+(20-x)*4.3=(50+115.8+6.5x)/1.5
    134.4+(24-x)*4.3=(50+89.2+6.5x)/1.5
    (0.75x-270)/3800=(0.75x-495)/2800

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