Question 193784
{{{system(-6x+5y+2z=10, 
-4x+5y+5z=29,
-9x+4y+z=8)}}}
<pre><font size = 4 color = "indigo"><b>
Answer (x,y,z) = (-1,-2,7)

There are many ways to solve this.  I have
no way of knowing which method you are 
studying.  Post again telling us which method
you are studying and we'll help you.  But
until I know which method, all I can do is give 
you the answer.

Edwin</pre>