Question

SHOW WORK!! need answer asap

Answer 1

10

Explanation:

Exterior angle = sum of interior angles

12 + 10x = 81 + 31

12 + 10x = 112

10x = 100

x = 10

Answer 2

x = 10

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