document.write( "Question 813409: really stuck on this equation with three variables. \r
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Algebra.Com's Answer #489647 by ewatrrr(24785) $\"\"$ $\"About$

You can put this solution on YOUR website!

 
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document.write( "Hi,
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document.write( "3x=-12  0r x = -4
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document.write( " 2x-y+3z=-1
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document.write( " 3x+4-z=-7\r
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document.write( "-8-y+3x = -1    |Substituting x = -4
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document.write( "-12-y -z = -1\r
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document.write( "-y + 3z = 7
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document.write( "-y -  z = 11\r
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document.write( "-y + 3z = 7
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document.write( "y  + z = -11   |Multiplying 2nd EQ by -1
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document.write( "   4z = -4
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document.write( "    z = -1   and y = -10 \n" );
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