We have 40 dolls that need to be boxed into 5 boxes evenly. We want to find the number of dolls in each box, which is represented by the variable $d$. We need to choose the correct equation to find $d$.

1. Problem Description

We have 40 dolls that need to be boxed into 5 boxes evenly. We want to find the number of dolls in each box, which is represented by the variable $d$. We need to choose the correct equation to find $d$.

2. Solution Steps

We are dividing the total number of dolls (40) into the number of boxes (5). Therefore, we need to divide the total number of dolls by the number of boxes to find the number of dolls in each box.

This can be represented by the equation:

$d = \frac{\text{Total number of dolls}}{\text{Number of boxes}}$

$d = \frac{40}{5}$

This is equivalent to $40 \div 5 = d$.

The other option is $40 \times 5 = d$, which means we would be multiplying the number of dolls by the number of boxes. This would give us a number much larger than the total number of dolls.

3. Final Answer

$40 \div 5 = d$