Find the value of x: 3x - 9 = 2x - 12

Let's solve this step-by-step:

1. Combine x terms: Subtract 2x from both sides:

   3x - 2x - 9 = 2x - 2x - 12

   x - 9 = -12

2. Combine number terms: Add 9 to both sides:

   x - 9 + 9 = -12 + 9

   x = -3

Ответ: x = -3