Respuesta :

Answer:

x = 35°

Step-by-step explanation:

A flat line = 180°

Knowing that, we can make an equation:

3x + 75 = 180

Now, solve:

3x + 75 = 180

    -  75   - 75

3x = 105

x = 35

Hope this helps :)

Answer:x=35

Step-by-step explanation:180-75=105

105/3=35