Question

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Answer 1

Step-by-step explanation:

y=107(vertically opposite angles)

x=180-107=73(angles on a straight line)

z=73(vertically opposite angles)

Answer 2

Answer:

${ \sf{y = 107 \degree}} \: \{ \sf{alternate \: angles} \}$

${ \sf{z + 107 \degree = 180 \degree}} \: \{ \sf{straight \: line \: angles \}} \\ z = 180\degree - 107\degree \\ z = 73\degree$

${ \sf{x = z}} \: \{ \sf{alternate \: angle \}} \\ x = 73\degree$