Determine whether the planes

a₁x + b₁y + c₁z = d₁ and a₂x + b₂y + c₂z = d₂

are parallel, perpendicular, or neither. The planes are parallel if there exists a nonzero constant k such that

a₁ = ka₂,

b₁ = kb₂,

and

c₁ = kc₂,

and are perpendicular when

a₁a₂ + b₁b₂ + c₁c₂ = 0.

5x + y 3z = 3, 30x 6y + 18z = 8