Explanation:

Let’s analyze the equation:

76 + 108 ÷ 9 - 11 × 2 = 18

- Original equation: 76 + 12 - 22 = 18 ? 76 + 12 = 88, 88 - 22 = 66, which is not equal to 18.

Let’s check each option:

Option 1: Swap 2 and 7

- 76 becomes 26, 2 becomes 7, 7 in 76 becomes 2 elsewhere.

- 26 + 108 ÷ 9 – 11 × 7 = 18 ? 26 + 12 – 77 = 18 ? 26 + 12 = 38, 38 - 77 = -39 (not 18).

Option 2: Swap 2, 8, 7

- Too many to swap, doesn’t simplify the equation.

Option 3: Swap 1 and 7

- 76 becomes 16, 11 becomes 77.

- 16 + 108 ÷ 9 - 77 × 2 = 18 ? 16 + 12 - 154 = 18 ? still not balanced.

Option 4: Swap 6 and 2

- 76 becomes 72, 2 becomes 6.

- New equation: 72 + 108 ÷ 9 - 11 × 6 = 18

- 108 ÷ 9 = 12; 11 × 6 = 66

- 72 + 12 - 66 = 84 - 66 = 18

Option 4 (6 and 2) is correct.