document.write( "Question 906681: 2x + 3y- z= -16
\n" ); document.write( "x + 2y + 2z= -3
\n" ); document.write( "-3x + y + z= -5 \n" ); document.write( "

Algebra.Com's Answer #550035 by MathLover1(20850) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"2x+%2B+3y-+z=+-16\"$ ............1
\n" ); document.write( " $\"x+%2B+2y+%2B+2z=+-3\"$ ............2
\n" ); document.write( " $\"-3x+%2B+y+%2B+z=+-5\"$ .............3
\n" ); document.write( "_________________\r
\n" ); document.write( "\n" ); document.write( " $\"2x+%2B+3y-+z=+-16\"$ ............1
\n" ); document.write( " $\"x+%2B+2y+%2B+2z=+-3\"$ ............2..multiply by $\"-2\"$
\n" ); document.write( "___________________\r
\n" ); document.write( "\n" ); document.write( " $\"2x+%2B+3y-+z=+-16+\"$ ............1
\n" ); document.write( " $\"-2x+%2B+2%28-2%29y+%2B+2%28-2%29z=+-3%28-2%29\"$ ............2
\n" ); document.write( "___________________\r
\n" ); document.write( "\n" ); document.write( " $\"2x+%2B+3y-+z=+-16+\"$ ............1
\n" ); document.write( " $\"-2x+-4y+-4z=+6\"$ ............2.....add both
\n" ); document.write( "______________________\r
\n" ); document.write( "\n" ); document.write( " $\"2x+%2B+3y-+z+-2x+-4y+-4z=+-16%2B6\"$
\n" ); document.write( " $\"+-y+-5z=+-10\"$
\n" ); document.write( " $\"10+-5z=+y\"$ ................1a\r
\n" ); document.write( "\n" ); document.write( "now take these two:\r
\n" ); document.write( "\n" ); document.write( " $\"x+%2B+2y+%2B+2z=+-3\"$ ............2....multiply by $\"3\"$
\n" ); document.write( " $\"-3x+%2B+y+%2B+z=+-5\"$ .............3
\n" ); document.write( "____________________.and add\r
\n" ); document.write( "\n" ); document.write( " $\"3x+%2B+6y+%2B+6z%2B%28-3x+%2B+y+%2B+z%29=+-9-5\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"3x+%2B+6y+%2B+6z-3x+%2B+y+%2B+z=+-14\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"+7y+%2B+7z++=+-14\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"7%28y+%2B+z+%29+=+-14\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"%28y+%2B+z+%29+=+-14%2F7\"$
\n" ); document.write( " $\"y+%2B+z+=+-2\"$
\n" ); document.write( " $\"y++=+-2-z\"$ ............1b\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "use 1a and 1b to calculate $\"z\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"10+-5z=+y\"$ ................1a
\n" ); document.write( " $\"+-2-z=y\"$ ............1b
\n" ); document.write( "________________
\n" ); document.write( "=>\r
\n" ); document.write( "\n" ); document.write( " $\"10+-5z=-2-z\"$
\n" ); document.write( " $\"10+%2B2=5z-z\"$
\n" ); document.write( " $\"12=4z\"$
\n" ); document.write( " $\"highlight%28z=3%29\"$ \r
\n" ); document.write( "\n" ); document.write( "now find $\"y\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"-2-z=y\"$
\n" ); document.write( " $\"+-2-3=y\"$
\n" ); document.write( " $\"highlight%28y=-5%29\"$ \r
\n" ); document.write( "\n" ); document.write( "and, find $\"x\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"x+%2B+2y+%2B+2z=+-3\"$ ............2
\n" ); document.write( " $\"x+%2B+2%28-5%29+%2B+2%2A3=+-3\"$
\n" ); document.write( " $\"x+-10+%2B+6=+-3\"$
\n" ); document.write( " $\"x+-4=+-3+\"$
\n" ); document.write( " $\"x+=+-3+%2B4\"$
\n" ); document.write( " $\"highlight%28x+=+1%29\"$ \r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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