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AMC 10 2021-fall-b Problem 12

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Which of the following conditions is sufficient to guarantee that integers xx, yy, and zz satisfy the equation x(x−y)+y(y−z)+z(z−x)=1?x(x-y)+y(y-z)+z(z-x) = 1? (A) x>y\textbf{(A)} \: x>y and y=zy=z (B) x=y−1\textbf{(B)} \: x=y-1 and y=z−1y=z-1 (C) x=z+1\textbf{(C)} \: x=z+1 and y=x+1y=x+1 (D) x=z\textbf{(D)} \: x=z and y−1=xy-1=x (E) x+y+z=1\textbf{(E)} \: x+y+z=1

Dataset text NuminaMath-1.5. Quoted with source.

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