Evaluate the following arithmetic expression:
`8xx9-70+64-:8`

Answer

To evaluate the arithmetic expression `8xx9-70+64-:8`, we will follow the order of operations, often remembered by the acronym BODMAS (Brackets, Orders, Division and Multiplication, Addition and Subtraction).

### Step-by-Step Solution:

1. **Identify the Expression**:
The expression is `8 * 9 - 70 + 64 / 8`.

2. **Perform Multiplication and Division First**:
- Calculate `8 * 9`:
\[ 8 * 9 = 72 \]
- Calculate `64 / 8`:
\[ 64 / 8 = 8 \]

3. **Rewrite the Expression**:
Now substitute the results back into the expression:
\[ 72 - 70 + 8 \]

4. **Perform Addition and Subtraction from Left to Right**:
- First, calculate `72 - 70`:
\[ 72 - 70 = 2 \]
- Then, add `8`:
\[ 2 + 8 = 10 \]

5. **Final Result**:
The final result of the expression is:
\[ \boxed{10} \]