Explanation:

- First, decode the symbols and digits according to the instructions:

- + becomes x

- x becomes +

- 3 becomes 8

- 8 becomes 3

- With these substitutions, transform the expression:

- The original expression is: 6 × 35 ÷ 5 + 8 - 9

- Substituted, it becomes: 6 + 85 ÷ 5 x 3 - 9

- Follow the rules of mathematical operations—first division and multiplication, then addition and subtraction:

- Calculate 85 ÷ 5 = 17

- Then 17 x 3 = 51

- Now compute the rest: 6 + 51 - 9

- Add: 6 + 51 = 57

- Subtract: 57 - 9 = 48

- The correct answer is 48. Option: 2, 48

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