Consider the line $L(t)=($:$55t,5,-5-5t$:$).$ Then:

$L$ is $$ to the plane $4x5z=20$

$L$ is $$ to the plane $7\mathrm{.}5x-7\mathrm{.}5z=60$

$L$ is $$ to the plane $10z-10x=-60$

$L$ is $$ to the plane $15x15z=15$