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December 19, 2014

December 19, 2014

Posted by **tasha** on Wednesday, July 18, 2012 at 2:58pm.

2x+y=3

3x-2y=1

- math -
**Steve**, Wednesday, July 18, 2012 at 4:30pmmanipulate the equations so that all elements below the main diagonal are zero.

So, subtract row 1 from 2/3 of row 2:

2x + y = 3

2x - 4/3 y = 2/3

2x + y = 1

-7/3 y = -7/3

y = 1

now plug that into row 1 to get x = 1

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