如何在表中的同一行上获取两个按钮

I have a problem to get two buttons on same row in table. I have searched solution for hours and hours but no luck. Here is my current code.

    <form class="controlbox" name="Register" id="registration" action="index.php" method="POST">
    <table style="margin-right: auto;">
    <tr>
      <td style="border: 1px solid gray;"><a href=”index.php”><button>Back</button></a></td>
      <td style="border: 1px solid gray;"><input type="submit" value="Register" onclick="User.processRegistration()"/></td>
     </tr>
    </table>
    </form>

I don't know how to make those buttons to show on same row inside separate td's.

</div>

I managed to fix it. Here is my code for my future reference and to others who are seeking this same information.

<form class="controlbox" name="Register" id="registration" action="index.php" method="POST">
  <table style="margin-right: auto;">
    <tr>
      <td style="border: 1px solid gray;"><a href=”index.php”><button>Back</button></a></td>
      <td style="border: 1px solid gray;"><button type="submit" onclick="User.processRegistration()">Register</button></td>
    </tr>
  </table>
</form>

Thank you anyway @aynber for your efforts