Respuesta :

Answer:

  • x = 19

Step-by-step explanation:

We know that:

  • 54 + 6x + 12 = 180

Solution:

  • 66 + 6x = 180
  • => 6x = 114
  • => x = 114/6
  • => x = 19

Hence, the measure of x is 19.