(5x-25)*6=90
    4(3-x)=4.8
    1-lnx/2lnx
    2.6x-6.5+3.5=10
    20.9-x=2.5*8
    0.8*(7.2+x)=7.92
    5*x*x-8x-2.2
    2*(4.5+x)=13
    1.25*4-0.25x=0.9
    4x-2.7*4=60
    (x+1.4)*0.4=2.4
    5x+4*1.5=13.5
    6.9x-2.6x=10.32
    6.9x-2.6=10.32
    24(A+14.2)=95A
    24(A+14.2)=94A
    56(A+14.2)=127A
    65(A+14.2)=136A
    23(A+14.2)=94A
    1.12X＝1.77

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