Explanation:

Let's analyze each option for the equation:

5 - 4 ÷ 2 + 7 × 3 = 14

- Option 1: ÷ and +

- Interchange ÷ and +: 5 - 4 + 2 ÷ 7 × 3

- Calculation: 5 - 4 + 2 ÷ 7 × 3 = 1 + (2 ÷ 7) × 3 = 1 + 0.857 ˜ 1.857 (not 14)

- Option 2: × and -

- Interchange × and -: 5 × 4 ÷ 2 + 7 - 3

- Calculation:

- 5 × 4 = 20

- 20 ÷ 2 = 10

- 10 + 7 = 17

- 17 - 3 = 14

- This satisfies the equation.

- Option 3: - and ÷

- Interchange - and ÷: 5 ÷ 4 - 2 + 7 × 3

- Calculation: 1.25 - 2 + 21 = -0.75 + 21 = 20.25 (not 14)

- Option 4: + and ×

- Interchange + and ×: 5 - 4 ÷ 2 × 7 + 3

- Calculation: 5 - 4 ÷ 2 × 7 + 3 = 5 - ((4 ÷ 2) × 7) + 3 = 5 - 14 + 3 = -6 (not 14)

Conclusion:

- Option 2 is correct! Interchanging × and - makes the equation true.