Question 642950
<pre>

I'm going to assume *[tex 5x\ +\ 2y\ =\ 31] because the numbers come out super ugly if you do *[tex 5x\ -\ 2y\ =\ 31]

{{{
( matrix( 2, 3, 
   6, 1, 19,
   5, 2, 31
 ) )
}}}


*[tex \frac{R1}{6}\ \rightarrow\ R1]

{{{
( matrix( 2, 3, 
   1, 1/6, 19/6,
   5, 2, 31 ) )
}}}


*[tex -5R1\ +\ R2\ \rightarrow\ R2]


{{{
( matrix( 2, 3, 
   1, 1/6, 19/6,
   0, 7/6, 91/6
 ) )
}}}

*[tex \frac{6R2}{7}\ \rightarrow\ R2]

{{{
( matrix( 2, 3, 
   1, 1/6, 19/6,
   0, 1, 13
 ) )
}}}


*[tex -\frac{R2}{6}\ +\ R1\ \rightarrow\ R1]

{{{
( matrix( 2, 3, 
   1, 0, 1,
   0, 1, 13
 ) )
}}}



John
*[tex e^{i\pi}\ +\ 1\ =\ 0]
My calculator said it, I believe it, that settles it
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</pre>