Find parametric equations for the straight line formed by intersection of the plane $x2y3z=0$ and $2xyz=0.$ You'll need at least one point on the line, which is easy in this case, and a vector that points along the direction of the line. This second could be done in a couple of ways. One is the cross product of normal vectors idea, the other is to somehow find a second point on the line and use the vector from the first point to the second.