To answer this question, you can use a factor tree, or the table thing (I forgot what it’s called.)
You divide the number by one of its PRIME factors, until there is only one left. The numbers you divided it by are written as shown.
Hope this helps. :)
        
             
        
        
        
Answer:
18 boys 
Step-by-step explanation:
we add 2 and 3 because they are equal parts:
2+3=5
Then we divide 45 by 5 because we want to find what 1 part equals"
45/5=9
We now do 9*2 to get an answer of:
9*2=18
hope this makes sense!
 
        
             
        
        
        
Answer:
"Round" (and any subsequent words) was ignored because we limit queries to 32 words.
Hope it can help you..... 
 
        
                    
             
        
        
        
Given -:
EF = 2X-7
FG = 4X-20
EG = 21
FIND OUT 
EF =?
FG = ?
To proof 
as given in the question 
we have the value of EF = 2X-7 , FG = 4X-20 and EG = 21
Thus we have 
EG = EF + FG
21 = 2X-7 + 4X- 20
21 = 6x - 27
48 = 6x
x = 8 
Hence proved
Now put this value 

Now

Hence proved