title: Solving simultaneous equations with R
body: <p>Suppose I have the following equations:</p>
  
  <pre><code> x + 2y + 3z = 20  
  2x + 5y + 9z = 100  
  5x + 7y + 8z = 200
  </code></pre>
  
  <p>How do I solve these equations for <code>x</code>, <code>y</code> and <code>z</code>? I would like to solve these equations, if possible, using R or any other computer tools.</p>