Question 1209594
<pre>

{{{system(5x + 3z  = 1,
-x + y - z = 0,
2x - 3y + 7z = -4)}}}

Since you did not tell us which method you have studied to use to solve systems,
I'll only give you the answers.  If you want to know how to get them, then tell
us the method you were told to use and we'll help you.

The answers are:
 
{{{system(x=16/23,y=-3/23,z=-19/23)}}}

Edwin</pre>