Answer:
68
Step-by-step explanation:
1) Find the interior angle using relations of angles in straight line I.e ( sum of angles in a straight line is 180 ) and we know the sum of all the interior angle of quadrilateral is 360 degree .
2) Solve further for x.
 
        
             
        
        
        
Answer:
hope it helps you plz mark me brilliantest 
Step-by-step explanation:
B
 
        
                    
             
        
        
        
Hey!
Let's write it, 

Add 

 to both sides,


Subtract 

 from both sides.


Since we don't want a negative variable, we have to divide both sides by 

.

Our answer would be,

Thanks!
-TetraFish