document.write( "Question 522228: I need help solving this problem\r
\n" ); document.write( "\n" ); document.write( "2x + 2y - 4z + w = -5
\n" ); document.write( " 3y + 4z - w = 0
\n" ); document.write( " 2z -7w = -6
\n" ); document.write( " 5w = 15 \n" ); document.write( "
Algebra.Com's Answer #346748 by richwmiller(17219)\"\" \"About 
You can put this solution on YOUR website!
5w=15
\n" ); document.write( "w=3
\n" ); document.write( "2z-7w=-6
\n" ); document.write( "2z-7*3=-6
\n" ); document.write( "2z-21=-6
\n" ); document.write( "2z=15
\n" ); document.write( "z=7.5
\n" ); document.write( "3y+4z-w=0
\n" ); document.write( "3y+4*7.5-3=0
\n" ); document.write( "3y+30-3=0
\n" ); document.write( "3y=-27
\n" ); document.write( "y=-9
\n" ); document.write( "2x+2y-4z+w=-5
\n" ); document.write( "2x-18-30+3=-5
\n" ); document.write( "2x-45=-5
\n" ); document.write( "2x=40
\n" ); document.write( "x=20\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "
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