Divide 3 from both sides to get a=57/3 then a=19
        
                    
             
        
        
        
Answer:
13.75 or 13 3/4
Step-by-step explanation:
 
        
             
        
        
        
880
Underline the number in the tens place
look to the right
if number is greater than 5
add 1 to the underlined number
leave the numbers behind the underlined number zero
        
                    
             
        
        
        
11111111111111117373646328299292922
        
             
        
        
        
11:02
i don't know if im correct, sorry.