Log5 (7x + 4) = l + log5 (2x – 1)
Log5(7x+4)=1+log5(2x-1) одз 2x-1>0 x>1/2 log5(7x+4)=log5 5+log5(2x-1) log5(7x+4)=log5 5(2x-1) 7x+4=10x-5 -3x=-9 x=3