Write down the coefficient of x in the following :
`-4bx`

Answer

To find the coefficient of \( x \) in the expression \( -4bx \), follow these steps:

### Step-by-Step Solution:

1. **Identify the Expression**: We are given the expression \( -4bx \).

2. **Understand Coefficient**: The coefficient of a variable in an algebraic expression is the numerical factor that is multiplied by that variable. In this case, we need to find the coefficient of \( x \).

3. **Look for the Variable**: In the expression \( -4bx \), the variable we are interested in is \( x \).

4. **Identify the Factors**: The expression \( -4bx \) can be broken down into two parts:
- The number \( -4 \)
- The variable \( b \)

5. **Combine the Factors**: The coefficient of \( x \) is the product of the numerical factor and any other variables that are multiplied with \( x \). Here, the coefficient of \( x \) is \( -4b \).

6. **Write the Final Answer**: Therefore, the coefficient of \( x \) in the expression \( -4bx \) is \( -4b \).

### Final Answer:
The coefficient of \( x \) in \( -4bx \) is \( -4b \).