One common way to deal with solving such a
    system is to let one variable equal $t$, and then solve for the
    other variables in terms of $t$. Do this three different ways.

    <ul>
      <li>If you let $x=t$, what are $y$ and $z$. Write your
      solution in the form $(x,y,z)$ where you replace $x$, $y$,
      and $z$ with what they are in terms of $t$.</li>

      <li>If you let $y=t$, what are $x$ and $z$ (in terms of
      $t$).</li>

      <li>If you let $z=t$, what are $x$ and $y$.</li>
    </u