document.write( "Question 331483: This site is for tutors to help not make the questions harder so nayone but john please help with this question. Solve the system x+y+z=-1
\n" ); document.write( "x-y+3z=-17
\n" ); document.write( "2x+y+z=-2 \n" ); document.write( "
Algebra.Com's Answer #237563 by mathmandotcom(31)\"\" \"About 
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x+y+z=-1
\n" ); document.write( "x-y+3z=-17
\n" ); document.write( "2x+y+z=-2\r
\n" ); document.write( "\n" ); document.write( "adding the first two we eliminate y
\n" ); document.write( "2x+4z=-18
\n" ); document.write( "adding equations 2 and 3 we eliminate y
\n" ); document.write( "3x+4z=-19
\n" ); document.write( "now we have two equations and two unknowns
\n" ); document.write( "2x+4z=-18
\n" ); document.write( "3x+4z=-19 multiply (2x+4z=-18)*-1 and add\r
\n" ); document.write( "\n" ); document.write( "-2x-4z=18
\n" ); document.write( "3x+4z=-19 adding we eliminate z
\n" ); document.write( "x=-1 substitution 3(-1)+4z=-19
\n" ); document.write( "-3+4z=-19 add 3 to both sides
\n" ); document.write( "4z=-16 divide by 4
\n" ); document.write( "z=-4 substitution x=-1,z=-4 to the original
\n" ); document.write( "x+y+z=-1
\n" ); document.write( "-1+y-4=-1
\n" ); document.write( "-5+y=-1 add 5
\n" ); document.write( "y=4
\n" ); document.write( "(x,y,z)=(-1,4,-4) answer \n" ); document.write( "
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