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March 24, 2017

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solve the elimination methods
4x-9y=18.5
7y-2x=-10.5

  • algebra - ,

    Rewrite the second equation
    -2x + 7y = -10.5 Now double it.
    -4x + 14y = -21
    Now add that to the first of your equations
    5y = -2.5
    y = -0.5

    4x + 4.5 = 18.5
    4x = 14
    x = 3.5

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