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March 26, 2017

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How many solutions are there for the linear system x – y = –5 and x + y = 1?

  • math - ,

    Eq1: x - y = -5
    Eq2: x + y = 1
    Add the Eqs:
    2x = -4
    X = -2.

    In Eq2, substitute -2 for X:
    -2 + y = 1
    Y = 3.

    Solution = (x,y) = (-2,3).
    The lines intersect @ only 1 point.Therefore, we have only one solution.

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