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30 December, 15:26

Y = - x + 4

x + 2y = - 8

How many solutions does this linear system have

one solution: (8, 0)

one solution: (0, 8)

no solution

infinite number of solutions

+4
Answers (1)
  1. 30 December, 17:33
    0
    Y = - x + 4 ... so sub in - x + 4 in for y in the other equation

    x + 2y = - 8

    x + 2 (-x + 4) = - 8

    x - 2x + 8 = - 8

    x - 2x = - 8 - 8

    -x = - 16

    x = 16

    y = - x + 4

    y = - 16 + 4

    y = - 12

    one solution (16,-12)
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