The Total solution for NCERT class 6-12
From figure,
y = 250 [Vertically opposite angles are equal]
Now ∠x + ∠y = 1800 [Linear pair ofangles]
x = 180 – 25
x = 155
Also, z = x = 155 [Vertically opposite angles]
Answer: y = 250 and z = 1550