Answer:
Step-by-step explanation:
L an M are parallel & P is transversal.
So, 120, x are co-interior angles, ie 180
x +120 = 180
x = 180 - 120
x = 60
The angle vertically opposite to x, will have the same value of x.
Vertically opposite angles are equal
In triangle, sum of angles = 180
60 + 90 + y = 180
150 + y =180
y =180 - 150
y =30