Respuesta :

Answer:

5x + 60 + 60 = 180

Step-by-step explanation:

If you solve that equation above, you will get the x - value.

Triangles have well 3 angles, and they all add up to 180. So 180-60-60= 60. This means that 5x=60. So you divide by 5 on each side and get x=12.