question_answer

If \[\mathbf{lo}{{\mathbf{g}}_{\mathbf{3}}}\mathbf{4 + lo}{{\mathbf{g}}_{\mathbf{3}}}\mathbf{7=x }-\mathbf{ 1}\], then find the value of\[\frac{\mathbf{lo}{{\mathbf{g}}_{\mathbf{10}}}\mathbf{ 84}}{\mathbf{lo}{{\mathbf{g}}_{\mathbf{10}}}\mathbf{ 28}}\].

A) \[\frac{x}{x+1}\]          

B) \[\frac{x+1}{x}\]

C) \[\frac{x-1}{x}\]                                                

D) \[\frac{x}{x-1}\]

E) None of these