document.write( "Question 804111: {x-y+2z=-7
\n" ); document.write( " {y+z=1
\n" ); document.write( " {x=2y+3z
\n" ); document.write( " \n" ); document.write( "

Algebra.Com's Answer #484614 by erica65404(394) $\"\"$ $\"About$

You can put this solution on YOUR website!
x-y+2z=-7
\n" ); document.write( "0x+y+z=1
\n" ); document.write( "add
\n" ); document.write( "x+3z=-6
\n" ); document.write( "next 2 times x-y+2z=-7
\n" ); document.write( "2x-2y+4z=-14
\n" ); document.write( "-x+2y+3z=0
\n" ); document.write( "add
\n" ); document.write( "x+7z=-14
\n" ); document.write( "make above graph negative
\n" ); document.write( "-x-7z=14
\n" ); document.write( "x+3z=-6
\n" ); document.write( "add
\n" ); document.write( "-4z=8
\n" ); document.write( "z=-2
\n" ); document.write( "plug in to y+z=1
\n" ); document.write( "y-2=1
\n" ); document.write( "y=3
\n" ); document.write( "plug y and z into x=2y+3z
\n" ); document.write( "x=2(3)+3(-2)
\n" ); document.write( "x=6-6
\n" ); document.write( "x=0
\n" ); document.write( "The answer is x=0, y=3, and z=-2. \n" ); document.write( "

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