Respuesta :

Answer:

x = 2.5

Step-by-step explanation:

In order to solve for x, we need to write an equation. This question gives us the angles of a triangle, so we can use this to write our equation. All angles of a triangle will always add to 180 degrees, therefore:

(12x+6) + 104 + 40 = 180

Now we can just take out the brackets, combine like terms and isolate and solve for x:

12x + 6 + 104 + 40 = 180

12x + 150 = 180

12x + 150 - 150 = 180 - 150

12x = 30

12x/12 = 30/12

x = 2.5

Hope this helped!