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tatumlee

  • one year ago

How many solutions does this system have? x-2y=2 y=-2x+5

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  1. Directrix
    • one year ago
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    x-2y=2 y=-2x+5 In the top equation, substitute (-2x +5) for y x-2y=2 x - 2*(-2x + 5) = 2 x +4x -10 = 2 5x - 10 = 2 x = ? @tatumlee

  2. tatumlee
    • one year ago
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    I added 10 to both sides and ended up with 5x=12 am I doing this right?

  3. tatumlee
    • one year ago
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    @Directrix

  4. Directrix
    • one year ago
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    >> 5x=12 am I doing this right? Yes. x = 12/5 That indicates that there is a solution to the system of equations.

  5. Directrix
    • one year ago
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    y=-2x+5 y = (-2)* 12/5 + 5 y = 1/5 The single solution is (12/5 , 1/5)

  6. Directrix
    • one year ago
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    @tatumlee

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