Hello,
10 is not a digit!
Let' a ,b ,c the 3 digits 
Numbers are 
10a+b
10a+c
10b+c
10b+a
10c+a
10c+b
sum = 22a+22b+22c=22(a+b+c)
sum /(a+b+c)=22
        
             
        
        
        
m - 9 = 42
42 is our final answer so that should be by itself. 
If something is being decreased by 9, that means that we are taking away 9 from something so it should be m - 9.
 
        
                    
             
        
        
        
The correct answer is :

Just it....
And we're done.
Thanks for watching buddy good luck.
♥️♥️♥️♥️♥️
 
        
             
        
        
        
7=0.5 |x-4| -3
+3                +3
10=0.5 |x-4|
10/0.5=0.5/0.5 |x-4|
20=|x-4|
             ^
-20=x-4   20=x-4
 +4    +4    +4    +4
-16=x       24=x
The answers are -16=x and 24=x
Hope this helps, an if it pleases you put as the brainliest answer!
        
                    
             
        
        
        
X=5 
because 3 goes into 12 4 times and 20 divided by 4 equals 5