Respuesta :

Answer:

x = 44

Step-by-step explanation:

The sum of the 3 angles in a triangle = 180°

Sum the 3 angles and equate to 180

x + 20 + 2x - 40 + 2x - 20 = 180, that is

5x - 40 = 180 ( add 40 to both sides )

5x = 220 ( divide both sides by 5 )

x = 44