title: Remove one value from a matrix and shift value left
body: <p>I have a matrix like this:</p>
  
  <pre><code>A= [5 3 2 1 5 6;
      3 2 5 1 5 3] 
  </code></pre>
  
  <p>and i have to remove the number 1 from the second line, and shift (the number 5 and 3) to the left. The result must be:</p>
  
  <pre><code>A= [5 3 2 1 5 6;
      3 2 5 5 3 X]
  </code></pre>
  
  <p>I put X, because no matter what happens with this number. The size of A can't modify.</p>