Answer:
It helps you see the equation in "picture" form. 
Step-by-step explanation:
When you see the inequality in a graph form, most people can benefit from seeing a different version of the same problem. 
 
        
             
        
        
        
18 = 2x + 4
2x = 14
  x = 7
answer
first line:  1st box: 18 and 2nd box: 4
second line:  $7 an hour
 
        
             
        
        
        
Answer:5hours
Step-by-step explanation:
58-10 = 48 dollars remain after the first hour
48/12 = 4 hours after the first hour
1+4=5 total hours
 
        
                    
             
        
        
        
B (if annual interest), 
200+12%=224
224+12%=250.88