Solve the equation $$-6 x + 2 y - 7 z = 0.$$

$\left[ \begin{array}{c} x \\ y \\ z \end{array} \right] = s$ $\left[\Rule{0pt}{3.6em}{0pt}\right.$$\left]\Rule{0pt}{3.6em}{0pt}\right.$ + $t$ $\left[\Rule{0pt}{3.6em}{0pt}\right.$$\left]\Rule{0pt}{3.6em}{0pt}\right.$