If '+' means `'div'`, '-' means `'xx, 'div'` means '+' means and `'xx'` means '-' then `36 xx 12 + 4 div 6 + 2 - 3 = ?`

Options

A. (a) 1
B. (b) 39
C. (c) 40
D. (d) 42

Answer

To solve the expression `36 xx 12 + 4 div 6 + 2 - 3`, we need to first replace the symbols according to the given meanings:

- `+` means `div` (division)
- `-` means `xx` (multiplication)
- `div` means `+` (addition)
- `xx` means `-` (subtraction)

Now, let's rewrite the expression with these replacements:

1. Replace `xx` with `-`:
- `36 xx 12` becomes `36 - 12`

2. Replace `+` with `div`:
- `+ 4` becomes `div 4`

3. Replace `div` with `+`:
- `div 6` becomes `+ 6`

4. Replace `+` with `div`:
- `+ 2` becomes `div 2`

5. Replace `-` with `xx`:
- `- 3` becomes `xx 3`

So the expression now looks like this:
`36 - 12 div 4 + 6 div 2 xx 3`

Next, we will replace the operations according to their new meanings:

1. `36 - 12` means `36 + 12` (because `-` means `xx`, which is multiplication):
- `36 - 12 = 36 + 12 = 48`

2. Next, we have `48 div 4`, which means `48 + 4` (because `div` means `+`):
- `48 div 4 = 48 + 4 = 52`

3. Now we have `52 + 6`, which means `52 - 6` (because `+` means `div`, which is addition):
- `52 + 6 = 52 - 6 = 46`

4. Next, we have `46 div 2`, which means `46 + 2`:
- `46 div 2 = 46 + 2 = 48`

5. Finally, we have `48 xx 3`, which means `48 - 3`:
- `48 xx 3 = 48 - 3 = 45`

Thus, the final answer is `45`.

### Summary of Steps:
1. Replace symbols according to their meanings.
2. Perform the operations in the correct order.
3. Calculate the result step by step.