Respuesta :

Answer:

176 units

Step-by-step explanation:

All sides of this octagon are of the same length.  Thus, x + 7 = (4/3)x - 1/3.

Mult. all terms by 3 will remove the fractions:  3x + 21 = 4x - 1.

Then 22 = x.  The perimeter of this figure is 8(22), or 176 units.