Respuesta :

wrz

Answer:

Answer is: (9)

Step-by-step explanation:

105+(8v+3)=180

(8v+3)=75

8v=72

v=9
105 + 105 = 210
opposite angels are the same
(8v + 3 ) + ( 8v+ 3)= 16v + 6
210 + 16v + 6 = 216 + 16 v
216 + 16v = 360
360 - 216 = 144
16 v = 144
v = 9