Hi, Expand, combine Like Terms and solve (x-2)(x+3)-(x+5)(x-7)=1 x^2 + x - 6 - (x^2 - 2x - 35) = 1 x^2 + x - 6 - x^2 + 2x + 35) = 1 3x + 29 = 1 3x = -28 x = -28/3