For 6,
The unknown number is x
Then, 3 more than the number will be
The answer is labelled G
For 11,
Just as it clearly stated "5 minus a number"
Then that is
The answer is labelled S
For 22,
3 fewer than a number can be re-translated 3 is less than a number.
Then it is
The answer is labelled G on the left hand side