Question 107278
Five plus a number is at least 16.
"At least" means that's the least (smallest) it can be, so it could be 16 (= 16)or it could be larger than 16 (> 16). So we would write.

{{{5+n >= 16}}} 

To solve this inequality, subtract 5 from both sides.
{{{5+n >= 16}}} Subtract 5.
{{{n >= 11}}}