Question

What is The Value Of Y In The Parallelogram below

Answer 1

The sum of any two adjacent angles of a parallelogram is 180° ⇒
angle adjacent to 64° = 180 - 64 = 116° 

In a parallelogram opposite angles are equal ⇒

4y + 12 = 116
4y = 116 - 12
4y = 104
y = 104/4
y = 26  ← answer.