hey!! 
here is your answer >>> 
1) 3x - 10 > 11 
 let's take this as 3x - 10 = 11 
 3x = 21 
 x = 7 
So, The numbers of X are always more than 7 
2) 9x + 2 < 5 
 9x + 2 = 5 
 9x = 3 
 x = 1÷2 
The numbers of X are always less than 1 ÷ 2 
3) 2x + 8 < 6 
 2x + 8 = 6 
 2x = 2 
 x = 1 
The numbers of X are less than 1 
4) 4x - 3 < 12 
 4x - 3 = 12 
 4x = 15 
 x = 15 ÷ 4 
The numbers of X are less than 15 ÷ 4 
5) 2 ( 9 + x ) > 20 
 2 ( 9 + x ) = 20 
 9 + x = 10 
 x = 1 
The numbers of X are more than 1 
We can solve the rest using this 
Hope my answer helps!