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If \beginvmatrix x & 3 & 6 \\ 3 & 6 & x \\ 6 & x & 3 \endvmatrix = \beginvmatrix 2 & x & 7 \\ x & 7 & 2 \\ 7 & 2 & x \endvmatrix = \beginvmatrix 4 & 5 & x \\ 5 & x & 4 \\ x & 4 & 5 \endvmatrix = 0 , then x is equal to: | Watch the step-by-step video solution for this NIMCET PYQ.