Question 173353
find the value of x & z 
<pre><font size = 4 color = "indigo"><b>
{{{system(2x-y+2z=15,-x+y+z=3,3x-y+2z=18)}}}

There are many ways to solve a system. Please
re-post telling us what method you are studying.

The solution is

{{{matrix(1,15,  "(", x, ",", y, ",", z, ")", "=", "(", 3, ",",1,",", 5,")" )}}}

Edwin</pre>