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- #1

- Feb 14, 2012

- 3,842

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If $x,\,y$ and $z$ are real numbers satisfying

$(x+1)(y+1)(z+1)=3\\(x+2)(y+2)(z+2)=-2\\(x+3)(y+3)(z+3)=-1$

find the value of $(x+20)(y+20)(z+20)$.

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