Question

ajudem


a) -(2x-8)
b) -3(-2x-5)
c) -(-7x-8)

Answer 1

Resposta:

A) - ( 2x - 8) = 0

  - 2x + 8 = 0

   -2x = 0 - 8

  - 2x = - 8 . (-1)

    2x = 8

      x = 8/4

      x = 4

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B) -3(-2x -5) = 0

   6x + 15 = 0

   6x = 0 - 15

   6x = -15

   x = 15/6

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C) - (-7x - 8) = 0

   7x + 8 = 0

   7x = 0 - 8

   7x = - 8

     x = - 8/7