Answer:
x = 53°
Explanation:
Before finding the error, let's know the properties of rhombus.
- All sides are equal.
 - Opposite sides are parallel. 
 - Opposite angles are equal.
 - Diagonals bisect each other at right angles.
 - Diagonals bisect the angles of a rhombus.
 - The sum of two adjacent angles is equal to 180 degrees. 
 
In this case:
Let's the point of intersection of diagonal be O.
m∡ QRP = x
m∡ SQR = 37°
Since diagonals bisect each other at right angles.
So, we have m∡ QOR.
In right angled triangle QOR 
m∡ QRP + m∡ SQR + m∡ QOR = 180°
Substitute the value.



Therefore, Value of x is 53°.