a) x+9 > 3
: x > -6
-6 0
-------------------------------] ---------------|-----------------------
b) x-4 ≤ 1
: x ≤ 5
0 5
-------------------|----------------- ]---------------------------------
c) 3x < 21
: x < 7
0 7
---------------|--------------------------------------- [---------------
d) 2x ≥ 10
: x ≥ 5
0 5
---------------|------------------[ ------------------------------------
e) -5x < -25
: x > 5
0 5
---------------|------------------] ------------------------------------
f) -x < 8
: x > -8
-8 0
-------------] ---------------------------------------|------------------
