_6
(15-9)×2=12, she began with 12 comic books, X=12
Answer:
Step-by-step explanation:
5.

6.

7.

8.

9.

10.

Answer:
Step-by-step explanation:
actually, it IS 7
Why are you taking a map test in january
Answer:
9x+9
Step-by-step explanation
Combine like terms (6x and 3x, 2 and 7)