Question

Rezolvati in multimea numerelor reale

Answer 1

$log_\big5 (2x-1) -log_\big53 = 0 \Rightarrow log_\big5 (2x-1) = log_\big53 \Rightarrow \\ \\ \Rightarrow 2x-1 = 3 \Rightarrow 2x = 3 +1 \Rightarrow 2x = 4 \Rightarrow x = \dfrac{4}{2} \Rightarrow \boxed{x=2}$