document.write( "Question 152085: Solve the following system of equations. what is the value of z?
\n" ); document.write( "x+y+z=1
\n" ); document.write( "2x-y+3z=-7
\n" ); document.write( "3x+2y+2z=4
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Algebra.Com's Answer #111798 by scott8148(6628)\"\" \"About 
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adding 1st eqn and 2nd eqn __ 3x+4z=-6 __ multiplying by 2 __ 6x+8z=-12\r
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\n" ); document.write( "\n" ); document.write( "multiplying 2nd eqn by 2 and adding 3rd eqn __ 7x+8z=-10\r
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\n" ); document.write( "\n" ); document.write( "subtracting eqns __ x=2\r
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\n" ); document.write( "\n" ); document.write( "substituting __ 6(2)+8z=-12 __ subtracting 12 __ 8z=-24 __ z=-3\r
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\n" ); document.write( "\n" ); document.write( "substituting __ (2)+y+(-3)=1 __ adding 1 __ y=2
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