title: Solving multiple formulas using recursion
body: <p>I have to use recursion to compute the value of the following formulas:</p>
  <pre><code>m = 1.4 *t + 1.2*z + 0.8*l + 0.1*o
  
  o = 1.0 *g + 1.3 *g + 1.3 *f + 0.2 *t
  
  t = 0.9*g + 0.9 *f
  
  l = 1.8 *t + 1.7 *g + 0.7 *o
  </code></pre>
  <p>With <code>f= 1.4, z= 1.7, g= 1.9</code></p>
  <p>I'm not sure how should I proceed into tranforming this into a recursive function.</p>