The equation of the $yz$-plane is

Find the angle between the planes $2x - y + z = 6$ and $x + y + 2z = 3$.

Find the equation of the plane with intercepts $2, 3$ and $4$ on the $x, y$ and $z$-axis respectively.

The equation of the plane passing through $(-1, 1, 2)$ whose normal makes equal acute angles with the coordinate axes is:

The length of the perpendicular from the origin to the plane passing through three non-collinear points $a, b, c$ is

What is the equation of the plane passing through the intersection of the planes $x + 2y + 3z - 4 = 0$ and $4x + 3y + 2z + 1 = 0$,and also passing through the origin?