Answer:
x= 18 , y = 6
Explanation:
A parallelogram has two opposite sides equal and parallel hence;
y + 4 = 10
y = 10 -4 = 6
Similarly
54 = 3x( opposite angle of a parallelogram are the same because it's congruent)
3x = 54
x = 54/ 3 = 18°
To be congruent means to have the same shape, size and form but can be flipped.