Mathematics
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    (80−2x)(12+2x)−16x=1156+640
    (80-2x)(12+2x)-16=1156+640
    x(x+10)=144
    5xx=4x
    (3x+1)(x-1)=(4x-1)(x-1)
    3×2^1-x=1×2^x-1
    3×2^x=1×2^-x
    1+x+x^2=31
    3X^2-6X-9=0
    2(X^2)-3X-1=0
    2*X^2-3X-1=0
    2X^2-3X-1=0
    25^2-20^2=X
    X^2=576
    25^2-7^2=X
    10^2+80-16X+X^2=10^2+X^2
    56X+2X(52-2X)=640
    56X+104X-4XX=640
    x²+2x=3
    x²+3x=3

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