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If (log)(10)(x-1)^3-3(log)(10)8(x-3)=(lo...

If `(log)_(10)(x-1)^3-3(log)_(10)8(x-3)=(log)_(10)8,` then `(log)_x 625` has the value of equal to: 5 (b) 4 (c) 3 (d) 2

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