Calculate the answer to the following expression: (2x + 3y) - (3x + 3y).
The answer to the expression (2x + 3y) - (3x + 3y) is calculated as follows: 
1. Distribute the negative sign on the second term to make it -3x - 3y
2. Combine like terms: 
- 2x and -3x combine to make - x
- 3y and -3y combine to make 0
3. So, the final answer is -x.
Complete the following task based on the instruction and optional input provided.### Instruction:
Calculate the answer to the following expression: (2x + 3y) - (3x + 3y).

### Output:
The answer to the expression (2x + 3y) - (3x + 3y) is calculated as follows: 
1. Distribute the negative sign on the second term to make it -3x - 3y
2. Combine like terms: 
- 2x and -3x combine to make - x
- 3y and -3y combine to make 0
3. So, the final answer is -x.