Find the value of
`5xx6-:3-5=5`
`8xx9-:4-8=?`

Options

A. 18
B. 10
C. 9
D. 12

Explanation

To solve the problem step by step, we will follow the order of operations (BODMAS/BIDMAS) which stands for Brackets, Orders (i.e., powers and square roots, etc.), Division and Multiplication (from left to right), Addition and Subtraction (from left to right).

### Step 1: Solve the first equation `5xx6-:3-5=5`

1. **Identify the operations**: The equation can be interpreted as \(5 \times 6 \div 3 - 5\).
2. **Perform division first**:
- Calculate \(6 \div 3 = 2\).
3. **Substitute back into the equation**:
- Now the equation becomes \(5 \times 2 - 5\).
4. **Perform multiplication**:
- Calculate \(5 \times 2 = 10\).
5. **Substitute back**:
- Now the equation is \(10 - 5\).
6. **Perform subtraction**:
- Calculate \(10 - 5 = 5\).

### Step 2: Solve the second equation `8xx9-:4-8=?`

1. **Identify the operations**: The equation can be interpreted as \(8 \times 9 \div 4 - 8\).
2. **Perform division first**:
- Calculate \(9 \div 4 = 2.25\) (or \(9/4\) if you want to keep it as a fraction).
3. **Substitute back into the equation**:
- Now the equation becomes \(8 \times 2.25 - 8\).
4. **Perform multiplication**:
- Calculate \(8 \times 2.25 = 18\).
5. **Substitute back**:
- Now the equation is \(18 - 8\).
6. **Perform subtraction**:
- Calculate \(18 - 8 = 10\).

### Final Answers
- The value of the first equation is \(5\).
- The value of the second equation is \(10\).