<PRE><B>Question 1060380</B>
&lt;pre&gt;&lt;b&gt;
Multiply the 3rd original equation by 2 and
add it to the 1st original equation:

{{{matrix(2,9,

2x,&quot;&quot;+&quot;&quot;,2y,&quot;&quot;-&quot;&quot;,6z,&quot;&quot;,&quot;&quot;=&quot;&quot;,&quot;&quot;,5,
-2x,&quot;&quot;-&quot;&quot;,2y,&quot;&quot;+&quot;&quot;,6z,&quot;&quot;,&quot;&quot;=&quot;&quot;,&quot;&quot;,8)}}}
----------------------------------
{{{matrix(1,9,

0x,&quot;&quot;+&quot;&quot;,0y,&quot;&quot;-&quot;&quot;,0z,&quot;&quot;,&quot;&quot;=&quot;&quot;,&quot;&quot;,13)}}}

That gives 0 = 13, which is false and therefore
the system is inconsistent and therefore has no 
solution.

Edwin&lt;/pre&gt;&lt;/b&gt;

</PRE>