Find the value of `13 + 13 xx 7-6 xx 12-[3 + 15 div 3-6 of (1//2)-1]`

Options

A. 25
B. 28
C. 30
D. `-33`

Answer

To solve the expression \( 13 + 13 \times 7 - 6 \times 12 - [3 + 15 \div 3 - 6 \times (1/2) - 1] \), we will follow the BODMAS rule (Brackets, Orders, Division and Multiplication, Addition and Subtraction).

### Step-by-Step Solution:

1. **Identify and Solve the Bracket**:
We start with the expression inside the brackets:
\[ 3 + 15 \div 3 - 6 \times (1/2) - 1 \]

2. **Perform the Division**:
Calculate \( 15 \div 3 \):
\[ 15 \div 3 = 5 \]
Now substitute back into the bracket:
\[ 3 + 5 - 6 \times (1/2) - 1 \]

3. **Perform the Multiplication**:
Calculate \( 6 \times (1/2) \):
\[ 6 \times (1/2) = 3 \]
Now substitute back into the bracket:
\[ 3 + 5 - 3 - 1 \]

4. **Perform the Addition and Subtraction inside the Bracket**:
Calculate \( 3 + 5 - 3 - 1 \):
\[ 3 + 5 = 8 \]
\[ 8 - 3 = 5 \]
\[ 5 - 1 = 4 \]
So, the value of the bracket is \( 4 \).

5. **Substitute Back into the Main Expression**:
Now substitute this value back into the main expression:
\[ 13 + 13 \times 7 - 6 \times 12 - 4 \]

6. **Perform the Multiplication**:
Calculate \( 13 \times 7 \) and \( 6 \times 12 \):
\[ 13 \times 7 = 91 \]
\[ 6 \times 12 = 72 \]
Substitute these values back:
\[ 13 + 91 - 72 - 4 \]

7. **Perform the Addition and Subtraction**:
Calculate \( 13 + 91 \):
\[ 13 + 91 = 104 \]
Now perform the subtractions:
\[ 104 - 72 = 32 \]
\[ 32 - 4 = 28 \]

### Final Answer:
The value of the expression \( 13 + 13 \times 7 - 6 \times 12 - [3 + 15 \div 3 - 6 \times (1/2) - 1] \) is \( 28 \).