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Hi..
2y° = (5x-20)° (vertically opposite angles) (1)
also,
(5x-20)° = (3x+40)° (exterior angles)
5x - 3x = 40 +20
2x = 60
x = 60/2
put x=30 in (1)
2y = 30×5 - 20
2y = 150-20
y = 130/2
upper angle is 130°
2y° = (5x-20)° (vertically opposite angles) (1)
also,
(5x-20)° = (3x+40)° (exterior angles)
5x - 3x = 40 +20
2x = 60
x = 60/2
put x=30 in (1)
2y = 30×5 - 20
2y = 150-20
y = 130/2
upper angle is 130°
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