Answer:
126
Step-by-step explanation:
if you divide 126 by 6 you get 21
the way you get 126 is you times 6 by 21 (reverse operation) to get that unknown number which is 126 in this case
 
        
                    
             
        
        
        
The answer as a fraction is 6/11
        
             
        
        
        
Answer:
third number = 4, 
equation of y, y = 5x - 11
equation of n, n = 4x
equation of x, n + x + y =19
Step-by-step explanation:
so lets write evertything as a n equation. n + x + y =19. N is the first number, x is the second number, and y is the third number. We will write the equation for y as follows 5x - 11. N will be four times the second number, so 4x. If substitute the values for out equation for x we will find what x equals to. So (4x) + x + (5x - 11) = 19
10x = 30
x = 3.
Then you substiute the answer for x in the equation for y. This will get you 5(3) - 11
15 - 11
4 = third number
 
        
             
        
        
        
Answer: 10 
Step-by-step explanation:
see attached picture 
 
        
             
        
        
        
SO from what I did was...
Since 24 x 3 = 72 , I did the same to 16. 
16 x 3 = 48 
But because instead of their being 3 teachers there is 1... What I did is just was to divide 48 / 2 which gave me the answer of 24... 
So what I think the answer is... 
There are 72 boys, 24 girls, and 1 teacher... 
Unless I am just dumb and it would be 48 girls, but I think I did it right. 
I hope I was able to help out.