Respuesta :

Answer:

  10x -17

Step-by-step explanation:

The perimeter is the sum of the side lengths:

  P = (5x -7) +(3x -4) +(2x -6)

Grouping like terms can make simplification easier:

  P = 5x +3x +2x -7 -4 -6

  P = 10x -17