[b]Example[/b][br]Intersect the line g: [math]X = \left( \begin{array}{c} 0\\ 1\\2 \end{array} \right) + t\cdot \left( \begin{array}{c} -1\\ -2\\1 \end{array} \right) [/math] and the plane ε: x + y + z = 1 und calculate the coordinates of the intercept point S.[br][br][b]Exercise[/b][br]Change the plane to ε: x + y + z = 2 and observe the consequences.[br]What are the coordinates of the intercept point now?