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5ず 次の等式を満たす整数の租 (z。?) をすべて求めよ。
(1) xyデニァ十2 %2) xyキァオッ0
(3) *yキァー2yデ0 *(4) 6%V十2ァ一3yー2
(5) 2zy十4z十83yデ0 っ画
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