document.write( "Question 147934This question is from textbook
\n" ); document.write( ": solve the system of equations. let z be parameter
\n" ); document.write( "5x + 3y + 4z = 19
\n" ); document.write( "3x - y + z = -4 \n" ); document.write( "
Algebra.Com's Answer #108324 by stanbon(75887)\"\" \"About 
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solve the system of equations. let z be parameter
\n" ); document.write( "5x + 3y + 4z = 19
\n" ); document.write( "3x - y + z = -4
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\n" ); document.write( "Rewrite:
\n" ); document.write( "5x + 3y= -4z + 19
\n" ); document.write( "3x - y = -z -4
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\n" ); document.write( "Multiply thru 2nd equation by 3 to get:
\n" ); document.write( "5x + 3y = -4z + 19
\n" ); document.write( "9x -3y = -3z - 12
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\n" ); document.write( "Add to eliminate the y-terms.
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\n" ); document.write( "14x = -7z + 7
\n" ); document.write( "x = (-1/2)z + (1/2)
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\n" ); document.write( "Substitute that into 3x-y = -z-4 to solve for \"y\":
\n" ); document.write( "3[(-1/2)z + (1/2)] - y = -z-4
\n" ); document.write( "(-3/2)z + (3/2) +z + 4 = y
\n" ); document.write( "y = (-1/2)z + (11/2)
\n" ); document.write( "------------------------
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "
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