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math

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100- 4 Px + Py +40 = 0
100- 4 Py + Px +40 = 0
Solve the above two equations to get Py = Px = 140/3.

How would you solve the two eq above??

  • math - ,

    Note that the two equations are not identical.

    Rearrange the equations:
    100- 4 Px + Py +40 = 0...(1)
    100- 4 Py + Px +40 = 0...(2)

    4Px-Py=140...(1a)
    Px-4Py=-140...(1b)

    Solve equations by elimination to get Px=Py=140/3

    4*(1a)-(1b):
    15Px=700, or Px=140/3

    Similarly:
    (1a)-4(1b):
    -3Py=-420, or Py=140/3

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