10x²-12x+3=0
    2/3x-2=4/3(5/3x-2)^2-8/3(5/3x-2)-4
    (120-0.5x)/(1.5x)+0.333=120/x
    (120-0.5x)/(1.5x)+0.3=120/x
    (120-0.5x)/(1.5x)+1/3=120/x
    120/x-20=1+(120-x)/(1.5x)
    120/x-20=(120-0.5x)/(1.5x)
    0.3(2x+1.3)=6.3
    120/x-20=(120-0.5x)/1.5/x
    120/x-20=(120-0.5x)/1.5x
    120/x-20=(120-0.5x)/1.5x
    4(x-0.75)=9
    0.3(2x+1.3)=6.3
    (120-0.5x)/(1.5x)
    (120-0.5x)/(1.5x)
    (120-0.5x)/1.5x
    0.33(2x+1.3)=6.3
    4(x-0.75)=9
    8x+11.2=7.2*5
    18.5x-9.9x=1.72

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