document.write( "Question 212741This question is from textbook
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Algebra.Com's Answer #160686 by Edwin McCravy(20055) $\"\"$ $\"About$

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$\"system%282x+%2B+y-z=5%2Cx%2B3y%2Bz=14%2C3x-y%2B2z=1%29\"$
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document.write( "Solve for any letter in any equation.\r\n" );
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document.write( "I'll arbitrarily choose to solve the middle equation for z.\r\n" );
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document.write( "Now substitute  for  in both\r\n" );
document.write( "the other two equations:\r\n" );
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document.write( "so we get\r\n" );
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document.write( "Then we simplify:\r\n" );
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document.write( "Now we have it down to 2 equations and 2 unknowns\r\n" );
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document.write( "We solve the 2nd one here for x:\r\n" );
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document.write( "Then we substitute  for  in the\r\n" );
document.write( "other equation:\r\n" );
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document.write( "becomes:\r\n" );
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document.write( "Then we solve for y:\r\n" );
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document.write( "Now we substitute  for y in\r\n" );
document.write( "the equation above solved for x:\r\n" );
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document.write( "Finally we substitute  for y and\r\n" );
document.write( " for x in the equation above solved for z:\r\n" );
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document.write( "So the final solution is \r\n" );
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document.write( "Edwin

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