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" If "A=[[0,1,3],[1,2,x],[2,3,1]]" and "...

" If "A=[[0,1,3],[1,2,x],[2,3,1]]" and "A^(-1)=[[1/2,-4,5/2],[-1/2,3,-3/2],[1/2,y,1/2]]," find "x,y

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