it would be 0, because in the origin equations, the d's cancel out since it's x-x, only 2 would be left, therefore the correct answer is A since 0+2=2 
 
        
             
        
        
        
Answer:
I aint never seen 2 pretty best friends ;)
Step-by-step explanation:
 
        
                    
             
        
        
        
It's 

because this choice made the most since.
 
        
        
        
In standard form the two equations are
  7x +y = 5
  7x +y = -5
The equations describe lines that are parallel.
        
             
        
        
        

Substract '-3.4x' at LHS nad the RHS of the above expression.

Add '4' on both LHS and RHs of the above expression.
