Answer:
Step-by-step explanation:
4b + 8 = 20
Subtract 8 from both sides
4b + 8 - 8 = 20 - 8
4b = 12
Now divide both sides by 4
4b/4 = 12/4
b = 3
Check: 
LHS = 4b + 8 
        = 4*3 + 8
         = 12 + 8
         = 20 = RHS
 
        
             
        
        
        
82,300 because you need to round it to the 100 place
        
             
        
        
        
The inverse operation of division is multiplication.
        
             
        
        
        
Answer:
8
Step-by-step explanation:
8 plus 9 plus 10 equals 27. so 8 is the smallest.