On subtracting 13 from 3 times of a number, the result is 8 .

Answer

To solve the problem step by step, we will follow the process of forming an equation based on the information given and then solving for the unknown number.

### Step-by-Step Solution:

1. **Understand the Problem**:
We need to find a number such that when we subtract 13 from 3 times that number, the result is 8.

2. **Define the Variable**:
Let the unknown number be represented by \( x \).

3. **Formulate the Equation**:
According to the problem, "3 times the number" can be written as \( 3x \). The equation based on the problem statement is:
\[ 3x - 13 = 8 \]

4. **Isolate the Variable**:
To solve for \( x \), we first need to isolate \( 3x \) on one side of the equation. We can do this by adding 13 to both sides:
\[ 3x - 13 + 13 = 8 + 13 \]
This simplifies to:
\[ 3x = 21 \]

5. **Solve for \( x \)**:
Now, divide both sides of the equation by 3 to find \( x \):
\[ x = \frac{21}{3} \]
Simplifying this gives:
\[ x = 7 \]

6. **Verify the Solution**:
To ensure our solution is correct, we can substitute \( x = 7 \) back into the original condition of the problem:
\[ 3(7) - 13 = 21 - 13 = 8 \]
Since this statement is true, our solution is verified.

### Final Answer:
The number is \( 7 \).