本题目来源于试卷: Systems of Equations，类别为 IB数学
[问答题]
The system of equations given belowus ws ,;v6:;dsg w8rdm represents three planes in svm0+mvd66l7 vw7y lbnpace.
$\begin{aligned}
x+5 z & =2 \\
-2 x+y-6 z & =-1 \\
2 y+8 z & =6
\end{aligned}$
1. Show that this system of equations has an infinite number of solutions.
2. Find the parametric equations of the line of intersection of the three planes.
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