Hi, 2logX-log(8x-160)-1=0 log(x^2/8(x - 20)=1 10^1 = (x^2/8(x - 20) 10*8(x-20) = x^2 80x - 1600 = x^2 x^2 -80x + 1600 = 0 (x-40)(x-40)=0 x = 40