Simutaneous equation by substitution:y+2x=0,4x+y=3..................solve for x and y

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26-03-2015
Mathematics

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Simutaneous equation by substitution:y+2x=0,4x+y=3..................solve for x and y

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Panoyin Panoyin · Answer 1 · 2015-04-04T11:13:49-04:00

1y + 2x = 0 ⇒ -2x - 1y = 0
4x + 1y = 3 ⇒ 4x + 1y = 3
      2x = 3
   2    2
      x = 1.5
   4(1.5) + y = 3
      6 + y = 3
   - 6 - 6
      y = -3
      (x, y) = (1.5, -3)