If + means - , - means x , x means ÷ , ÷ means +, then what will come in place of the question mark (?) in the following equation?

$7-24\times 6÷18+7=?$

The correct option is 39.

To find the value that comes in place of the question mark, we substitute the mathematical operators according to the rules given in the question:

- "+" is replaced by "-"
- "-" is replaced by "x"
- "x" is replaced by "��"
- "÷" is replaced by "+"

The original equation is:

$7-24\times 6÷18+7=?$

Applying the operator substitutions, we get the modified expression:

$7\times 24÷6+18-7$

Now, we solve this expression step-by-step using the BODMAS rule (Brackets, Orders, Division/Multiplication, Addition/Subtraction from left to right):

Step 1: Division
First, divide 24 by 6:
$24÷6=4$

Substitute this back into the expression:
$7\times 4+18-7$

Step 2: Multiplication
Next, multiply 7 by 4:
$7\times 4=28$

Substitute this back into the expression:
$28+18-7$

Step 3: Addition
Add 28 and 18:
$28+18=46$

Substitute this back into the expression:
$46-7$

Step 4: Subtraction
Finally, subtract 7 from 46:
$46-7=39$

Thus, the final value is 39.