Question

find the value of x in the following figure.
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Answer 1

Answer:x=80 degrees

Step-by-step explanation:

2x+20=180 (since it’s a linear pair)

2x=180-20

2x=160

x=160/2

x=80

Answer 2

Step-by-step explanation:

We can clearly note that the two angles are adjacent and lie on the same line

Hence they are linear pair angles and by linear pair axiom their sum is equal to 180°

Therefore,

2x + 20 = 180

2x = 180 - 20

2x = 160

x = 80°