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If 2^x*3^(x+4)=7^x, then x is equal to (...

If `2^x*3^(x+4)=7^x,` then x is equal to (A) `(4log3)/(log7-log6)` (B) `(4log 3)/(log 6-log 7)` (C) `(2 log3)/(log7-log6)` (D) none of these

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