Respuesta :

Answer:

w = 4

Step-by-step explanation:

The sum of the 3 angles in a triangle = 180°

sum the 3 angles and equate to 180

13w + 18w + 56 = 180

31w + 56 = 180 ( subtract 56 from both sides )

31w = 124 ( divide both sides by 31 )

w = 4