Answer:
Refer to the attachment for better understanding .
From the given figure we observe the "∠ABC = 90°
∠ABO = 43°
∠OBC = (x-7°)
We have to find the value of x .
Sum of ∠ABO + ∠OBC = 90°
Putting the value we get
↠ 43° + ( x - 7°) = 90°
↠ x - 7° = 90° - 43°
↠ x-7° = 47°
↠ x = 47° + 7°
↠ x = 54°
Therefore , the value of x is 54° .
