2/x - 3/(x - 4) < 5/2|·2; 4/x - 6/(x - 4) < 5; (4(x - 4) - 6x)/(x(x - 4)) < 5;
(4x - 16 - 6x)/(x(x - 4)) < 5; (-2x - 16)/(x(x - 4)) < 5; (2x + 16)/(x(x - 4)) > -5;
(2x + 16)/(x(x - 4)) + 5 > 0; (2x + 16 + 5x(x - 4))/(x(x - 4)) > 0;
(2x + 16 + 5x² - 20x)/(x(x - 4)) > 0; (5x² - 18x + 16)/(x(x - 4)) > 0|:5;
(x² - 3,6x + 3,2)/(x(x - 4)) > 0; (x - 1,6)(x - 2)/(x(x - 4)) > 0;
++++ ---- +++ ---- ++++
---------0-------1,6------2-------4--------------->
x∈(-∞; 0)U(1,6; 2)U(4; ∞)