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March 29, 2017

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solve the simultaneous equations to find the coordinates of the point of intersection for the pair of lines of the simultaneous equations. Then check the answer by graphing the equations
3x-y=-4
2x-y=0

  • math - ,

    3x-y=-4
    2x-y=0
    -3x+y=4
    -x=4
    x=-4
    Plug that back into either equation to solve for y.

  • math - ,

    Second equation:
    2x-y=0, 2x=y, y=2x

    Firs equation:3x-y=-4

    3x-y=3x-2x= x=-4 x=-4
    y=2x=2*(-4)=-8 y=-8
    Check of result:


    First equation:
    3x-y=3*(-4)-(-8)=-12+8=-4

    Second equation:
    2x-y=2*(-4)-(-8)=-8+8=0

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