If -2x - 7 = 7x + 2, what is the value of x?
Adding 2x to both sides, we have 
    -7 = 9x + 2.
Then, subtracting 2 from both sides, we have -9 = 9x, so x = -1.
Complete the following task based on the instruction and optional input provided.### Instruction:
If -2x - 7 = 7x + 2, what is the value of x?

### Output:
Adding 2x to both sides, we have 
    -7 = 9x + 2.
Then, subtracting 2 from both sides, we have -9 = 9x, so x = -1.