Question

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Answer 1

2x+7x=180

9x=180

x=180/9

x=20

now

2x=2*20=40

7x=7*20=140

now

y=2x=40

Answer 2

Answer:

2x+7x=180°(linear pair)

9x=180°

x=20°

2x=y(vertically opposite angle)

20°*2=y

40°=y

hope it will help you.