2y+4x=8 when x=-2,1,3

1 answer:

kondor19780726 [428]3 years ago

5 0

4x + 2y = 8

When x = -2:    4x + 2y = 8
4(-2) + 2y = 8
-8 + 2y = 8
      + 8    + 8
   2y = 16
      2    2
   y = 8
       (x, y) = (-2, 8)

When x = 1:   4x + 2y = 8
      4(1) + 2y = 8
      4 + 2y = 8
      - 4 - 4
      2y = 4
   2    2
      y = 2
      (x, y) = (1, 2)

When x = 3: 4x + 2y = 8
   4(3) + 2y = 8
   12 + 2y = 8
   - 12 - 12
   2y = -4
      2 2
   y = -2
      (x, y) = (3, -2)

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