The normal vectors to the planes and are and . If you take the cross-product of these two vectors, you will get a vector that points in the same direction of the line. Then, all you have to do is find two points A and B on that line, and let C = . Then the cross-product of the vectors AC and BC will be a normal vector to the desired plane, whose equation will be , and s can be determined by putting point C into the equation: .