document.write( "Question 1203611: x+4y-6z=-1
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Algebra.Com's Answer #839580 by MathTherapy(10552)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "x+4y-6z=-1\r\n" );
document.write( "2x-y+2z=-7\r\n" );
document.write( "-x+2y-4z=5\r\n" );
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document.write( "I've said it many times before and I will continue to say it!! Something is seriously wrong with that\r\n" );
document.write( "MATHLOVER \"character.\" I don't think this person is capable of learning to do math the way it should be\r\n" );
document.write( "done, without taking the student through \"hell,\" especially when some math problems are so easy to solve. \r\n" );
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document.write( "  x + 4y - 6z = - 1 ----- eq (i)\r\n" );
document.write( " 2x -  y + 2z = - 7 ----- eq (ii)\r\n" );
document.write( "- x + 2y - 4z = 5 ------- eq (iii)\r\n" );
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document.write( "Now, looking at the system of equations, since she's so \"bent\" on using substitution, then why not \r\n" );
document.write( "solve eq (i) for x, since its coefficient is 1, or eq (ii) for y, since its coefficient is - 1, or even \r\n" );
document.write( "eq (iii) for x, since it too has a coefficient of - 1? She instead chose to solve the one equation, # 1,\r\n" );
document.write( "for y - with a coefficient of 4 - that produces a fractional expression for y, which in most cases \r\n" );
document.write( "can cause errors and sheer torment to most students! \r\n" );
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document.write( "Why does this person keep doing these things? Is this how a tutor - a mere quasi-tutor, in her case - helps others?\r\n" );
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document.write( "One doesn't have to even bother applying substitution as it's quite obvious/clear as daylight that when eqs\r\n" );
document.write( "(i) & (iii) are combined/added, x is immediately eliminated, which means that one or another pair of equations would \r\n" );
document.write( "need to be manipulated in order to eliminate x too. A pair of equations in \"y\" and \"z\" would then remain to be solved!
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