2x+1(36-x)=94
    2x+(36-x)=94
    2x+(36-x)= 94
    （x-14.4）/14.4=（16.57-x）/16.57
    12.09×c=（（3.3+c）×7.92
    12.09×c=（（3.3+c）×7.93
    (x-1280)*0.75*4000 = (4000+6000/4.8)*(x-1280-6000*0.09)*0.75
    (x-1280)*0.75*4000=(4000+6000/4.8)*(x-1280-6000*0.09)*0.75
    (x-1280)*0.75*4000=(4000+6000/4.8)*(x-1280-6000*0.91)*0.75
    5/8:x=1/3
    5/8x=1/3
    3:8=1.5:x
    9（x-1）^2-（3x+4）（3x-4）
    3(2y-1)-4(1+3y)=5
    5.44/220*(1/(24.736*x))=1.487884869*10^77
    3x+4（25-x）＝88
    3x+（25-x）＝88
    X^2-11.7x+30=0
    200000=3693.24*((1-(1+X)^-60)/X)
    200000=3693.24*((1-(1+X)^60)/X)

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