Respuesta :

urviasawla97

Answer:

6x - 8

Step-by-step explanation:

  1. perimeter of a triangle is equal to adding all of the sides together
  2. so, x-2 + 2x +1 + 3x - 7
  3. collect like terms, x + 2x + 3x - 2 + 1 - 7
  4. 6x - 8

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