`16+8-:4-2xx3`

Answer

To solve the expression \( 16 + 8 -: 4 - 2 \times 3 \), we will follow the order of operations, often remembered by the acronym BODMAS/BIDMAS (Brackets, Orders, Division and Multiplication, Addition and Subtraction).

### Step-by-Step Solution:

1. **Identify the operations**: The expression consists of addition (+), division (/:), multiplication (×), and subtraction (-).

2. **Rewrite the expression**: The expression can be rewritten for clarity:
\[ 16 + \left( \frac{8}{4} \right) - (2 \times 3) \]

3. **Perform the division**: According to BODMAS, we first perform the division:
\[ \frac{8}{4} = 2 \]
Now the expression looks like:
\[ 16 + 2 - (2 \times 3) \]

4. **Perform the multiplication**: Next, we perform the multiplication:
\[ 2 \times 3 = 6 \]
Now the expression becomes:
\[ 16 + 2 - 6 \]

5. **Perform the addition**: Now we perform the addition:
\[ 16 + 2 = 18 \]
The expression now is:
\[ 18 - 6 \]

6. **Perform the subtraction**: Finally, we perform the subtraction:
\[ 18 - 6 = 12 \]

Thus, the final answer is:
\[ \boxed{12} \]