Hello! I have a question about this problem. I feel that I am missing
something here. I don't know where to begin, and I am unsure of the
process. Any help would be greatly appreciated!
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OK, first of all, go back to the lecture notes, we covered this. The line of intersection consists of points that are in both planes. The parametric form of a line is given by data that consist of 1) a vector (which we called u in the lecture notes) with endpoint at some single point in the line (which must consist a point in both planes) and 2) a vector parallel to the line (which we called v in the lectures notes and which must therefore of a vector in both planes, hence perpendicular to both normal vectors--hint, hint, hint). The problem helps you choose both of these by constraining u so that its z-component is zero and constraining v so that its x-component is 12.
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