document.write( "Question 905036: solve the following 3x3 equations by using an algebraic method to get an exact point of intersection. state that the planes are parallel or coincident.\r
\n" ); document.write( "\n" ); document.write( "x+y+z=-2
\n" ); document.write( "x-y+2z=-5
\n" ); document.write( "3x+y+z=-12 \n" ); document.write( "
Algebra.Com's Answer #548982 by ewatrrr(24785)\"\" \"About 
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x+y+z=-2
\n" ); document.write( "x-y+2z=-5 2x + 3z = -7
\n" ); document.write( "3x+y+z=-12 4x + 3z = -17
\n" ); document.write( "............
\n" ); document.write( "2x + 3z = -7 |multiplying thru by -2 to eliminate the x variable by adding the Eqs
\n" ); document.write( "4x + 3z = -17
\n" ); document.write( "-3z = -3
\n" ); document.write( "z = 1, and x = -5 \"2x+=+-10\"
\n" ); document.write( "and
\n" ); document.write( "y = 2 \"-5+%2B+y+%2B+1+=+-2\"
\n" ); document.write( "The ordered triple (-5, 2, 1) the solution for this System of EQs\r
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