document.write( "Question 475268: 3x + 5y -z =11
\n" ); document.write( "2x + y - 3z=12
\n" ); document.write( "y + 2z = -4 \n" ); document.write( "
Algebra.Com's Answer #325953 by mananth(16946)\"\" \"About 
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3x+5y-z =11 -------------- 1
\n" ); document.write( "2x+y-3z =12 -------------- 2
\n" ); document.write( "y+2z=-4 -------------- 3
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\n" ); document.write( "consider equation 1 &2 Eliminate y
\n" ); document.write( "Multiply 1 by 1
\n" ); document.write( "Multiply 2 by -4
\n" ); document.write( "we get
\n" ); document.write( "3x+5y-z = 11
\n" ); document.write( "-8x+y+12z= -48
\n" ); document.write( "Add the two
\n" ); document.write( "-5x+6y+11z= -37 ------------- 4
\n" ); document.write( "consider equation 2 & 3 Eliminate y
\n" ); document.write( "Multiply 2 by -1
\n" ); document.write( "Multiply 3 by 1
\n" ); document.write( "we get
\n" ); document.write( "-2 x + -1 y + 3 z = -12
\n" ); document.write( "0 x + 1 y + 2 z = -4
\n" ); document.write( "Add the two
\n" ); document.write( "-2x+5z= -16 -------------5
\n" ); document.write( "Consider (4) & (5)Eliminate x
\n" ); document.write( "Multiply 4 by 2
\n" ); document.write( "Multiply (5) by -5
\n" ); document.write( "we get 2
\n" ); document.write( "-10 x + 22 z = -74
\n" ); document.write( "10 x + -25 z = 80
\n" ); document.write( "Add the two
\n" ); document.write( "-3 z = 6
\n" ); document.write( "/ -3
\n" ); document.write( "z = -2
\n" ); document.write( "Plug the value of z in 5
\n" ); document.write( "-2 x + -10 = -16
\n" ); document.write( "-2 x = -6
\n" ); document.write( "x = 3
\n" ); document.write( "plug value of x & z in 1
\n" ); document.write( "9 + 5 y + 2 = 11
\n" ); document.write( "5 y = -9 + -2 + 11
\n" ); document.write( " y= 0
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\n" ); document.write( "m.ananth@hotmail.ca
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