Find the value of x: 7x + 1 = 3x - 7

Let's solve this step-by-step:

1. Combine x terms: Subtract 3x from both sides:

   7x - 3x + 1 = 3x - 3x - 7

   4x + 1 = -7

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

   4x + 1 - 1 = -7 - 1

   4x = -8

3. Isolate x: Divide both sides by 4:

   4x / 4 = -8 / 4

   x = -2

Ответ: x = -2