Respuesta :

malakmaku

Answer:

6

Step-by-step explanation:

(13a-13)+(14a)+(3a+13)= 180°

= 13a-13+14a+3a+13= 180°

=30a = 180

,a = 180÷30 = 6

,a=6

hope its correct

(13a-13) + (14a) + (3a+13)= 180
30a=180
180/30= 6
a=6