Write in If-Then Form $$x = 9 \text { if } 2 x + 9 = 27 \text {. }$$

Multiple Choice

Write in if-then form.
- $$x = 9 \text { if } 2 x + 9 = 27 \text {. }$$

A) If $2 x + 9 \neq 27$ , then $x = 9$ .
B) If $x \neq 9$ , then $2 x + 9 = 27$ .
C) If $x = 9$ , then $2 x + 9 = 9$ .
D) If $2 x + 9 = 27$ , then $x = 9$ .