document.write( "Question 150666: solve equations let z be the parameter
\n" ); document.write( "5x + 3y + 4z=19
\n" ); document.write( "3x - y + z = -4
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Algebra.Com's Answer #110619 by vleith(2983)\"\" \"About 
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5x + 3y + 4z=19
\n" ); document.write( "4z = 19 - 5x - 3y
\n" ); document.write( "z = (19 - 5x - 3y)/4\r
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\n" ); document.write( "\n" ); document.write( "3x - y + z = -4
\n" ); document.write( "z = -4 - 3x + y
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