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If |{:(x,3,6),(3,6,x),(6,x,3):}|=|{:(2,x...

If `|{:(x,3,6),(3,6,x),(6,x,3):}|=|{:(2,x,7),(x,7,2),(7,2,x):}|=|{:(4,5,x),(5,x,4),(x,4,5):}|=0` then x is equal to

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