 <h1>Solving Systems of equations</h1>

  <div class="problem">
    <div class="marginpar">
      For additional practice, make up your own systems of
      equations. Use Wolfram Alpha or Sage to check your work.
    </div>
    Solve the following linear systems of equations.

    <ul>
      <li>$\begin{cases}x+y&=3\\2x-y&=4\end{cases}$</li>

      <li>$\begin{cases}-x + 4y&=8\\3x - 12y&=2\end{cases}$</li>
    </ul>
    <div class="sage"><script type="text/x-sage">
var('x,y')
solve([x+y==3, 2*x-y==4], (x,y