document.write( "Question 61537This question is from textbook Beginning and Intermediate Algebra
\n" ); document.write( ": Express the solution in the form(x,y,z,w)
\n" ); document.write( "3x+y-z+2w=9
\n" ); document.write( "x+y+2z-w=10
\n" ); document.write( "x-y-z+3w=-2
\n" ); document.write( "-x+y-z+w=-6\r
\n" ); document.write( "\n" ); document.write( "Please show me how th get the corret answes I've been working on this problem for 2 days now and it's due tomorrow someone pls help. \n" ); document.write( "
Algebra.Com's Answer #42358 by asha(30)\"\" \"About 
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3x+y-z+2w=9 eqn.1
\n" ); document.write( "x+y+2z-w=10 eqn.2
\n" ); document.write( "x-y-z+3w=-2 eqn.3
\n" ); document.write( "-x+y-z+w=-6 eqn.4
\n" ); document.write( "eqn3+eqn4 =-2z+4w =-8
\n" ); document.write( "taking out 2 as the common factor we get
\n" ); document.write( "-z+2w =-4 eqn.5
\n" ); document.write( "plugging value of -z+2w in eqn.1 we get
\n" ); document.write( "3x+y-4=9
\n" ); document.write( "3x+y =13 eqn.6
\n" ); document.write( "eqn.1-eqn.4 =4x +w=15 eqn.7
\n" ); document.write( "eqn.2 +eqn.4 =2y+z =4 eqn.8
\n" ); document.write( "eqn.5 +eqn.7 gives 2y+2w+4=4
\n" ); document.write( "2y +2w=4-4 =0
\n" ); document.write( "y +w =0
\n" ); document.write( "eqn.6 +eqn.7 gives 7x +y +w =28
\n" ); document.write( "but y+w=0
\n" ); document.write( "therefore 7x=28
\n" ); document.write( "x=28/7=4
\n" ); document.write( "plugging value of x in eqn.7 we get 16+w=15
\n" ); document.write( " w=15-16 =-1
\n" ); document.write( "but y+w =0
\n" ); document.write( "so y =-w =-(-1) =1
\n" ); document.write( "using eqn.8 we get by plugging value of y in it
\n" ); document.write( "2+z =4
\n" ); document.write( "z=4-2 =2
\n" ); document.write( "the answers are x=4, y=1, z=2 and w=-1.
\n" ); document.write( "you can check the answer by plugging the values in any equation.
\n" ); document.write( "good luck !!! \n" ); document.write( "
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