Answer:
[tex]12x - 12[/tex]
Step-by-step explanation:
Step 1: Combine like terms
[tex]3x + 9x - 12[/tex]
[tex](3x + 9x) - 12[/tex]
[tex]12x - 12[/tex]
Answer:
[tex]12x - 12[/tex]
If needed solve for x
[tex]12x - 12 + 12 = 0 + 12[/tex]
[tex]12x / 12 = 12 / 12[/tex]
[tex]x = 1[/tex]
