Explanation:

Let's solve the given question step by step:

- Step 1: Simplify the left side:

55 × 35 – 25 × 35

= 35 × (55 – 25)

= 35 × 30

= 1050

- Step 2: Formulate the equation:

Therefore, 1050 = ? + 80

- Step 3: Solve for '?':

? = 1050 – 80

= 970

Now, compare with the options:

1. 1030

2. 1120

3. 1220

4. 1430

5. None of these

- After calculation, 970 is not in the given options.

- Correct Answer: Option 5: None of these