document.write( "Question 230400: how can i solve this problem in matrix form?
\n" ); document.write( "Problem: 3x-y=-2
\n" ); document.write( " 5x+2y=15 \n" ); document.write( "

Algebra.Com's Answer #170650 by Alan3354(69443) $\"\"$ $\"About$

You can put this solution on YOUR website!
3x-y=-2
\n" ); document.write( "5x+2y=15
\n" ); document.write( "---------
\n" ); document.write( "|3 -1 +2|
\n" ); document.write( "|5 +2 -15|
\n" ); document.write( "-------
\n" ); document.write( "Det =
\n" ); document.write( "|3 -1|
\n" ); document.write( "|5 +2|
\n" ); document.write( "= 3*2 - 5*-1 = 6+5
\n" ); document.write( "Det = 11
\n" ); document.write( "--------
\n" ); document.write( "x:
\n" ); document.write( "|-1 +2|
\n" ); document.write( "|+2 -15|
\n" ); document.write( "= 15 - 4 = 11
\n" ); document.write( "11/Det = 1
\n" ); document.write( "x = 1
\n" ); document.write( "--------
\n" ); document.write( "-y:
\n" ); document.write( "|3 +2|
\n" ); document.write( "|5 -15|
\n" ); document.write( "= -45 - 10 = -55
\n" ); document.write( "-55/11 = -5
\n" ); document.write( "-y = -5
\n" ); document.write( "y = 5\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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