Answer:
[tex]x > 3[/tex]
Step-by-step explanation:
1) Add 6 to both sides.
[tex]9x > 21 + 6[/tex]
2) Simplify 21 + 6 to 27.
[tex]9x > 27[/tex]
3) Divide both sides by 9.
[tex]x > \frac{27}{9} [/tex]
4) Simplify 27/9 to 3.
[tex]x > 3[/tex]
Therefor, the answer is option B. x > 3.