What is the variables replacement
        
                    
             
        
        
        
Answer:
3
Step-by-step explanation:
 
        
             
        
        
        
Answer:
6x+2
Step-by-step explanation:
your combine like terms...
so 13x is teh same as -7x
13x-7x= 6x
3 and -1 are the same as well
3-1=2
so teh answer would be 
6x+2
 
        
                    
             
        
        
        
Edging is 18.84m. to find the edging you  must do the radis times 2, then that answer by pi (3.14). So you do 3x2=6, then 6x3.14=18.84m