$($A$)5\frac{dy}{dx}-7y=4x$

$($B$)36\frac{d^{2}y}{d{x}^2}=9y$

$($C$)5\frac{dy}{dx}-7y=0$

$($D$)8\frac{d^{2}y}{d{x}^2}-7\frac{dy}{dx}+6y=0$

$($E$)\frac{dx}{dz}+9z=0$

which are homogeneous