Respuesta :

Answer:

x=51

Step-by-step explanation:

The external angle is equal to the sum of the opposite interior angles

3x-22 = x+80

Subtract x from each side

3x-22-x = x+80-x

2x-22 = 80

Add 22 to each side

2x-22+22 = 80+22

2x = 102

Divide by 2

2x/2 = 102/2

x = 51