title: Replace an item in a list by another item
body: <p>I have to replace in a list the multiples of <code>5</code> by the number + <code>x</code>. For example, if I have the list <code>[1,3,5,7,9,9,11,13,15,17,19,21,23,25,27,29]</code>, the result has to be <code>[1,3,5x,7,9,11,13,15x,17,19,21,23,25x,27,29]</code>. I have tried to develop the script but it doesn't work, can anyone help me?</p>
  <pre class="lang-py prettyprint-override"><code>numbers = list (range(1,31))
  
  odds = [number for number in numbers if number % 2 == 1]
  
  print(odds)
  
  for index, value in enumerate(odds):
     
      if value%5==0:
          odds[index] = '5x'
  
  print(odds)
  </code></pre>