Six more than two time a certain number is less than the number increased by twenty.

Hey there! 

To answer this question, suppose that the number is the variable x. 

- "Six more than two times a certain number"
We can represent '6 more than two times a certain number' as: 
2x+6

- "Is less than"
We can represent 'is less than' by using the symbol <

- "The number increased by 20"
Since x is the variable, it would be represented as: 
x+20

So, the final solution is: 
2x+6 < x+20

Thank you!