Respuesta :

wegnerkolmp2741o

Answer:

x = 10

Step-by-step explanation:

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

12 +10x  = 81 + 31

Combine like terms

12 +10x = 112

Subtract 12 from each side

12-12+10x = 112-12

10x= 100

Divide each side by 10

10x/10 = 100/10

x = 10

amna04352

Answer:

10

Step-by-step explanation:

Exterior angle = sum of interior angles

12 + 10x = 81 + 31

12 + 10x = 112

10x = 100

x = 10

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