Log5 ( x + 3 ) = log5 25/( 2x - 1 ), ОДЗ х>-3 и >1/2⇒x∈(1/2;≈) x + 3=25/( 2x - 1 ) (x + 3)(2x - 1 )=25 2x²+5x-28=0,D=249 x1=(-5-√249)/4∈Jlp x2=(-5+√249)/4