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math

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how do you solve by gaussian elimation
2x+y=3
3x-2y=1

  • math -

    manipulate 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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