Find the value of x: 5x - 1 = 4x - 9

Here's how we solve this one:

1. Combine x terms: Subtract 4x from both sides:

   5x - 4x - 1 = 4x - 4x - 9

   x - 1 = -9

2. Combine number terms: Add 1 to both sides:

   x - 1 + 1 = -9 + 1

   x = -8

Ответ: x = -8