Explanation:

- The problem involves three numbers: A, B, and C.

- From the first condition: A - 5 = B + 5 --> \( A = B + 10 \)

- From the second condition: C + 10 = B + 10 --> \( C = B \)

- From the third condition: A + C = 450.

Let's solve the equations step by step:

- Substitute \( C = B \) into \( A + C = 450 \).

- So, \( A + B = 450 \).

- We know \( A = B + 10 \), so substitute it in:

- \( (B + 10) + B = 450 \)

- \( 2B + 10 = 450 \)

- \( 2B = 440 \)

- \( B = 220 \)

- Therefore, the correct answer is: Option 2: 220