Answer:
x = 12 and y = 60°
Explanation:
As we can see it is parallelogram as the opposite sides are parallel 
so, 
y = 60° {opposite angles of a parallelogram are equal } 
x + 3 = 15 (opposite sides of a parallelogram are equal) 
x = 15 - 3 
x = 12 
Hope it will help :)❤