title: 3-Line -->　triangle --> 3-inequality　I want to convert
body: <p>I would appreciate any good advice.
  I want to determine the inequality sign from the triangular part of the seven places.</p>
  <p><a href="https://www.wolframalpha.com/input/?i=x+%E2%88%92+y+%3D+0%2C+x+%2B+y+%E2%88%92+2+%3D+0%2C+3*x+%E2%88%92+y+%E2%88%92+6+%3D+0&amp;lang=ja" rel="nofollow noreferrer">https://www.wolframalpha.com/input/?i=x+%E2%88%92+y+%3D+0%2C+x+%2B+y+%E2%88%92+2+%3D+0%2C+3*x+%E2%88%92+y+%E2%88%92+6+%3D+0&amp;lang=ja</a></p>
  <p><a href="https://www.wolframalpha.com/input/?i=x+%E2%88%92+y+%3E%3D+0+%2C+x+%2B+y+%E2%88%92+2+%3E%3D+0%2C++3*x+%E2%88%92+y+%E2%88%92+6+%3C%3D+0&amp;lang=ja" rel="nofollow noreferrer">https://www.wolframalpha.com/input/?i=x+%E2%88%92+y+%3E%3D+0+%2C+x+%2B+y+%E2%88%92+2+%3E%3D+0%2C++3*x+%E2%88%92+y+%E2%88%92+6+%3C%3D+0&amp;lang=ja</a></p>
  <p>Input:
  x − y = 0, x + y − 2 = 0, 3*x − y − 6 = 0</p>
  <p>I want to convert bellow</p>
  <p>Output:
  x − y &gt;= 0 , x + y − 2 &gt;= 0,  3*x − y − 6 &lt;= 0</p>