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Jean Marie
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Find a line parallel to two planes and interesectingintersecting two lines.

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maq
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Find a line parallel to two planes and interesecting two lines.

Given planes:

$$\pi_1: 3x+12y-3z-5=0$$ $$\pi_2: 3x-4y+9z+7=0$$

and lines $$l_1: x=3-2t, y=-1+3t, z=2+3t$$ $$l_2: x=-5+2t, y=3-4t, z=-1+3t$$ find a line that is parallel to the planes and intersects with these two lines.

For the new line to be parallel to two planes its direction vector has to be cross product of $[-2,3,3]$ and $[2,-4,3]$. But then I can choose only one point for the parametric form of this line. But lines $l_1$ and $l_2$ do not intersect. What should I do? Thanks for your help.