For this question you should first add -4d on both sides of the equation and then add +16 on both sides:
25d - 4d = 26+16 
21d = 42 
d = 42/21 
d = 2 :)))
I hope this is helpful
have a nice day
        
                    
             
        
        
        
Answer:
honestly i think it might be (C)
Step-by-step explanation:
 
        
             
        
        
        
Answer: Simple interest= Principal× rate× time/ 100
                                   Amount= Simple interest + Principal
Step-by-step explanation: