Question 143899
-1, 1, 6, 13

x - 3>_6  

you have to substitute values and see if the inequality verifies:

if x=-1 then  -1-3>_6 then -4>_6 (then x=-1 is not a solution to the inequality)
if x= 1 then   1-3>_6 then -2>_6 (then x=1 is not a solution to the inequality)
if x= 6 then   6-3>_6 then  3>_6 (then x=6 is not a solution to the inequality)
if x=13 then  13-3>_6 then 10>_6 (then x=13 is a solution to the inequality)