Explanation:
all we should do here is multiply both sides by -1 and switch the sign ≤ since we multiplied by a negative number 
x is equal or greater than 3 so 3 is included 
3 will be represented by a clored dot 
so the graph is D 
again multiply by -1 to get rid of the - signs and switch ≤ by ≥ since it's a negative number 
-  -6 -x ≤ -3 
- 6+x ≥ 3 substract 6 from both sides 
- x+6-6 ≥ 3-6 
- x ≥ -3 
x is equal or greater than -3 so -3 is included 
the graph is b since there is a dot in -3