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    2x-3/7=5
    (3-x)/5=(-2-3x)/4
    1/2(2x-3)=1/4(-x-1)
    1/2(x-1)=2/3(1-x)
    (600+x)/(140+x)=3
    600+x/140+x=3
    ex/x
    xe^x=1
    xe^2=1
    x/(100+x)=0.125
     128 *x^6-192*x^4+72*x^2 -x-2 = 0
    12/x-12/1.2x=10
    (18000+x)/12=(9500+x)/7
    0.3Q²-4Q-40=0
    41-x=59
    50(x-2)+170=55(x-1)
    4778488278883777+x=1672782882*3
    2.44×t+5.51×t^2=2.74
    41-x=59
    x^2-10x+22=0

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