Pls answer this one

Dear Student
 Let us say u = 55

Vertically opposite angles are equal

Therefore u = x = 55

z and x are angles that are a linear pair

Therefore, z + x = 180

z = 180 – x
z = 180 - 55
z  = 125

​​​​​​u and y angles are a linear pair
u + y = 180
y = 180 - 55
y = 125

Regards