Answer:
No solution, this is not an arithmetic sequence
Step-by-step explanation:
An arithmetic sequence is the same number being added over and over. This is not the case.
 
        
             
        
        
        
Answer:
2
Step-by-step explanation:
7+2n = 11
2n = 11-7
2n = 4
n = 4/2 
therefore n = 2
 
        
             
        
        
        
Answer:
2(7x-4)
Step-by-step explanation:
 
        
                    
             
        
        
        
Given:
4x + 7 = 23
Let's solve for x.
First Step:
Subtract 7 from both sides
4x + 7 - 7 = 23 - 7
4x = 16
Next Step:
DIvide both sides by 4

ANSWER:
x = 4