document.write( "Question 400010: I am attempting to solve system of linear equations through elimination. I have an entire list of them due but if you can help me promptly with this one, I should be able to use it as a guide with the others. Thank you in advance.\r
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\n" ); document.write( "x+y-7=2
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Algebra.Com's Answer #283232 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( "solving system of linear equations through elimination
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document.write( "2x-y+z=1
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document.write( "x+y-7=2
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document.write( "3x-y+z=0\r
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document.write( "\n" );
document.write( "2x-y+z=1
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document.write( "3x-y+z=0\r
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document.write( "-2x +y -z=-1  |Mulitplying 1st equation by -1, prior to adding the equations
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document.write( " 3x -y +z=0
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document.write( "  x = -1
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document.write( "x+y-7=2   |Substituting x = -1 into an equation to solve for y
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document.write( "-1 + y = 9
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document.write( "  y = 10
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document.write( "3x-y+z=0  |Substituting x = -1 and y = 10 into an equation to solve for z
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document.write( " -3 -10 + z = 0
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document.write( "        z = 13
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document.write( "CHECKING our Answer***
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document.write( "2x - y + z =1
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document.write( " -2 -10 + 13 = 1 \n" );
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