Respuesta :

Step-by-step explanation:

3x+2x+15x=20x

hope it helps.

meghamallick93

Answer:

9° Or 20x

Step-by-step explanation:

2x+3x+15x = 180°

20x = 180°

x = 180°÷20

x = 9°

Or,

2x+3x+15x = 20x