hello I'm in need of some help on this homework question please thank you

Given:
An equation is:
[tex]5x+11=5x+missing\text{ number}[/tex]Required:
Find the missing number so the equation has infinitely many solutions.
Explanation:
The equation consists of equal expression on both sides of the equation has an infinite solution.
Thus the equation becomes for an infinite solution as:
5x + 11 = 5x+11
Thus the missing number will be 11.
Final