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March 27, 2017

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Solve the following system of linear equation using any algebraic method.
2x+5y=3
X-3y=7

  • algebra 1 - ,

    from the 2nd:
    x-3y = 7 --> x = 3y+7
    sub into the first
    2x + 5y = 3
    2(3y+7) + 5y = 3
    6y + 14 + 5y = 3
    11y = -11
    y = -1
    sub that into x = 3y+7 = -3+7 = 4

    x = 4 , y = -1

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